Here is a delicious low-carb baked chicken and zucchini casserole dish with tomatoes. It's made extra special with some mozzarella cheese melted on top!
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I've always liked the taste of zucchini with tomato. I usually fry the chicken separately and serve the vegetables on the side.
This time, I decided to combine them together into a casserole dish and put some melted mozzarella cheese on top.
This low carb baked chicken and zucchini casserole with tomatoes is a delicious dish that is sure to please!
Ingredients Needed For Zucchini Casserole
To keep things simple, I used just a handful of whole ingredients. All of the exact ingredient amounts are in the recipe card at the bottom of this post.
Chicken
To make this casserole, you need some chicken breasts. I suggest using boneless and skinless chicken breasts or even chicken breast tenderloins.
Vegetables
For the fresh produce, I just used some zucchini and tomato. If you have some yellow squash, slice it up and use it too!
Seasoning
I spiced it up with some garlic powder, salt, pepper, basil, and oregano. I basically used my favorite Italian spices.
Cheese
Then, I topped it with mozzarella cheese because it has the best melting consistency. You can easily swap this out for your favorite cheese.
Please note: Check out the recipe card at the bottom for a full list of ingredients used to make this low carb recipe.
Quick Tips:
- If you buy thick chicken breasts from the store, slice them really thin. This will help the chicken cook faster and more evenly. This is also why I prefer to buy chicken breast tenders, they are already thin.
- If you add different veggies to it, just chop them up really small (or slice them really thin). This will help them all bake evenly so that you don't have some crispy or raw pieces and some really cooked and smooshy ones.
How To Make Low-Carb Zucchini Chicken Casserole
All of the exact steps for this recipe are in the printable recipe card at the bottom of this post. First, here is an overview of the recipe along with some photos of the process.
Brown The Chicken Breasts
For this recipe, I sliced chicken breasts thin, added seasoning, and then browned them up in a skillet.
Layer them out in your casserole dish.
Cook Up All Of The Veggies
After I cooked the chicken breast on the stove, I placed them in the casserole dish. Then, I sauteed the zucchini and tomatoes in the skillet.
After both are cooked up nicely, I added the veggies to the casserole dish!
Add Cheese And Bake
Top it all with some mozzarella cheese and just bake it until the cheese melts all over the casserole.
The cheese makes this yummy chicken and zucchini casserole extra special. And, it really gives the dish an added flavor boost!
It's kind of like a chicken pizza without the crust.
You'll want to be sure to bake this low carb chicken with zucchini and tomatoes until it's nice and brown. I find it has the best flavor when baked golden.
What To Serve With Chicken and Zucchini Casserole
Since this has such a mild and classic flavor, it goes with just about anything you can think of as a side dish. Since it already has zucchini and tomatoes in it, this is a complete meal all on its own.
A few other low-carb sides will make this feel like a feast. Since this dish has Italian seasonings, it will taste really good with some oven-roasted asparagus that also has some mild flavors.
If you like mashed potatoes, serve this casserole with some mashed turnips or garlic cauliflower mash. Both of them taste a lot like mashed potatoes but with less than 9g net carbs per serving!
After dinner, serve a sweet and low-carb dessert. One slice of coconut key lime pie only has 2 grams of net carbs.
Frequently Asked Questions About Chicken and Zucchini Casserole
Before we get to the recipe, I wanted to answer some questions people have about my baked chicken and zucchini casserole.
Can I make this casserole in the crockpot?
Yes, it's really easy to turn this into a slow cooker meal. You don't have to precook anything, either.
To make this in the slow cooker, just follow these steps:
- Place the sliced chicken breasts (raw) in the slow cooker.
- Add 1 cup of chicken broth, seasonings, and the diced tomatoes.
- During the last 2 hours of cooking, add the zucchini.
- Before you serve it, sprinkle some mozzarella cheese on top.
That's it! I prefer it in the oven because it bakes it to a delicious golden brown, but the slow cooker also works in a pinch.
How do you store leftovers?
Leftovers don't last very long, this recipe really tastes the best fresh out of the oven. Store leftovers in an airtight container in the refrigerator. They will last up to 3 days.
Can I use squash instead of zucchini?
Yes, you can use yellow squash instead of zucchini. In fact, if you really want to save time, you can even steam some frozen zucchini and then bake that with your chicken and cheese.
Can I make this without tomatoes?
Yes, you can leave out the tomatoes! That won't change the end result enough to make a difference.
What cheese can I use instead of mozzarella?
I think the mozzarella really melts the best and has a mild flavor so that the rest of the ingredients stand out more. You can also use sharp cheddar too if that's what you have. I can see that tasting just as good.
Baked Chicken and Zucchini Casserole With Tomatoes!
My family loved this chicken and zucchini casserole meal so much that I'm going to have to put the dish on our regular rotation. It really does have a wonderful flavor and is fairly easy to prepare.
Not to mention, the ingredients are super easy to find!
If you love chicken, you may also want to check out the low carb chicken casserole recipe collection I put together here. You will find more winning chicken dinners there to keep your family off carbs.
And, if you'd like a quick and easy chicken skillet dish, our favorite is Filipino Adobo Chicken. My kids always finish it off so there are rarely leftovers. I like to make that recipe with chicken thighs, but breast meat could also be used.
Other Casserole Recipes To Try
If you enjoyed this zucchini casserole recipe, then you will love my other low-carb one-pan dishes too. These are some of my favorites:
- Keto Chicken Cordon Bleu Casserole is super cheesy and has all your favorite French spices in it.
- Keto Pepper Steak is a takeout favorite that you can serve with cauliflower rice.
- Mexican Zucchini And Ground Beef Skillet has lots of spice and heat - it's perfect on taco Tuesday!
- Cabbage Lasagna has lots of cheesy layers, just like the pasta version.
- Chicken And Shrimp Stir Fry is packed with nutrients with crispy broccoli and zesty Asian sauces.
Follow us on FACEBOOK, PINTEREST, and INSTAGRAM for even more tasty keto-friendly recipes!
Recipe
Baked Chicken and Zucchini Casserole with Tomato
Video
Ingredients
- 2 boneless chicken breasts
- 1 Tablespoon olive oil
- dash garlic powder
- dash salt
- ½ teaspoon basil
- dash pepper
- ½ teaspoon oregano
- 1 small zucchini
- 1 medium tomato diced
- ½ cup mozzarella cheese
Instructions
- Butterfly slice each chicken breast in half to make four thin pieces. Season with garlic powder, salt and pepper. Brown chicken slices on each side in olive oil, about 2-3 minutes per side. Place in medium baking dish.
- Saute zucchini in pan until soft. Add diced tomato, basil, and oregano. Season with salt and pepper. Cook an additional 2-3 minutes. Pour over chicken.
- Cook in 325 degrees F oven for 20 minutes. Top with mozzarella cheese. Bake an additional 5 minutes.
Low Carb Sweeteners | Keto Sweetener Conversion Chart
Nutrition
Additional Info
Notes on Nutritional Information
Nutritional information for the recipe is provided as a courtesy and is approximate only. We cannot guarantee the accuracy of the nutritional information given for any recipe on this site. Erythritol carbs are not included in carb counts as it has been shown not to impact blood sugar. Net carbs are the total carbs minus fiber.
Copyright
© LowCarbYum.com - Unauthorized use of this material without written permission is strictly prohibited unless for personal offline purposes. Single photos may be used, provided that full credit is given to LowCarbYum.com along with a link back to the original content.
Updated on February 11, 2021, with new images and additional recipe information. First published on August 18, 2010.
John R.
I did everything the same except I added sliced baby portobellas and sliced red onion with the zucchini and sauteed them all together. It was delicious! Thank you for the recipe.
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Claudia Green
Very good but did make some changes. Baking thin chicken breasts 20 minutes after browning seemed like way too long. After browning I removed them from the skillet then added the zucchini and tomato and spices as the recipe directs; then simply added the chicken back in, covered the skillet and it was done in 10 minutes. One less dish to clean!
Amy
I changed this a bunch because of what I had on hand. Used deli chicken cut up, about 3 c., 1 medium zucchini cubed. Used a can of drained tomatoes & drained black beans. Added 1/2 c cooked onion. Used 1 t basil, 1 t oregano, 1 t basil, 1 t paprika, 1 t cumin. 1/2 c plain yogurt & grated Mexican cheese. It was VERY GOOD!! Thanks for basics I started with!
Lisa
I am going to make this tomorrow night with cheddar cheese
Sandy
I absolutely love this dish! I have to admit though, I always use way more zucchini than the recipe calls for because I love zucchini. I’m having it for dinner tonight and can hardly wait. It is definitely YUM!
Angela
Yummy
sandra phillips
addition to previous comment..i served it over rice, but riced cauliflower would work just as well
sandra phillips
i pan fried the chicken til brown, removed from pan, sauted onions in the oil, added in the sliced zucchini and diced tomato. cooked about 5 mins, added the chicken back, put the lid on and simmered for about 10 mins. removed the lid and sprinkled on the cheese, turned off the heat and covered it for about 5 mins to melt the cheese. turned out awesome and a bit quicker and only used one pan.
Lisa MarcAurele
Great idea! Thanks for sharing that tip.
Jennifer
This was amazing...just added basil!
Heather
Hi! This looks delicious! I would like to know exactly the crockpot way to make it. Is it cooked on high or low and how long? Thanks so much!
Lisa MarcAurele
I've used a casserole crock pot with it on high for 3 to 4 hours then I add the cheese and place in the oven to melt the cheese.
Rosie
Hi I,m still learning the bee Keto lifestyle and was wondering if I can use a cup of frozen broccoli. Can you please tell me if the net carbs increase and how much. Thank you Rosie
Lisa MarcAurele
You can use frozen broccoli if you'd like instead of zucchini. 1 small zucchini is usually a little over a cup. A small zucchini has about 1.5g net carbs while a cup of broccoli has about 6g net carbs. So it will increase about 1.1g net carbs per serving.
Lisa ward
Prepped this recipe this morning for dinner tonight and lunches during the week. had some zucchini in the fridge that needed to be used up. I snuck a taste and it was awesome!! The nutritional stats on this are great!! It is an absolutely delicious high protein low carb meal. I have made several recipes on your site and have loved each and every one of them. Thank you for helping make healthy eating delicious!!
Rebecca
I am making this tonight for a woman who is having surgery but they won’t be eating it till Thursday can it be frozen or should I cook it and have them put it in their fridge raider till Thursday how long will it stay OK
Lisa MarcAurele
It should last about 5 to 7 days after it's cooked in the refrigerator. I recommend that over freezing.
CAREN
Excellent recipe! Cooked tonight for hubby and me and doubled it for another meal. Loved it!!
Guy B
Quick and easy delicious recipe. I add different things it is so versatile mushrooms, onion, red pepper just a great meal.
Thanks Chris S. for bringing this winner to our attention.
Amy Rob
Super simple and quick to fix… I did a little substitution however… I spiced it up with salt pepper onion and garlic and just a little Cayenne pepper to give it a little kick and it was absolutely fantastic!
Diane B
My daughter made this last night. It was very easy and it was delicious!! Definitely will make a lot more !!!
Annette Rathgeber
This was a quick and easy recipe. I will definitely make it again. You have to be careful to not overcook on the skillet or the chicken will dry out. Otherwise this was perfect.
Chandra Olivas
Delicious and easy! I add some crushed red pepper because we like it spicy!
Gayle
DElicious! One of the easiest low carb recipes
Peggy
Looks delicious am widowed trying to cut back to a one person healthy meal
Alicia
Simply Delicious way to use Fresh items in a Garden. You make me want to Plant some more.) I opt for Lemon Juice sub. the Oil. Works well on any Diet, maybe with Dairy Free Cheese. I love this site, came across while looking for Keto Recipes. I will be stopping by often.)
Maria
Delicious and easy! Have even made it with canned tomato when that was all I had.
Linda
This recipe is delicious. Will for sure make it again.
Jim
This chicken was delicious! Thank you for sharing a very tasty recipe!
Cathe
I see the nutrition values are listed. what is the fiber? how many grams? Please
Lisa MarcAurele
If it is not shown, it means it was calculated to be zero.
Delia J. Senft
Can not wait to try! Sounds delicious!!
Karen
Going to try this week. I think I'll serve on top of cauliflower rice to soak up some of the good juice I'm seeing in the baking dish!
Janice Ward
Very good!
Sandra
Wonderful but next time I would add onions.
Karen
Great idea!
Linnie Buhman
so easy! and you can make for one just as easy as making it for a whole family. This is definitely going to be something I will make regularly
MARY ODEA
my husband and I loved this dish
John Chandler
Looks fantastic, on a low carb diet, will definitely try.
Deborah Widener
I tried this recipe it’s truly yummy, looking for wards to others to come...
Angi
It doesn’t tell how many servings it makes
Lisa MarcAurele
It's at the top of the recipe card... "4 servings"
mary
I am trying to eat more of these type recipes & would love to read more of them from you .. tks Mary
Lisa MarcAurele
You might like some of my other low carb casserole recipes too.
Gabi
This was very bland. We added a sauce on the side which gave it a good flavor. I would make it again but would not cook the chicken ahead. I would cook the zucchini though. I will try diced tomatoes instead of grease.
Lauralee
How long do you cook the chicken on each side in the pan first? I don’t want to dry it out or over cook it
Lisa MarcAurele
It's about 2-3 minutes per side.
Mary
I made this recipe tonight. It was light and tasty. My husband wants a bed of rice or potato scallops next time; me I would add a salad with fruit. Thanks
Heather Gyecsek
Just tried this tonight! Awesome! Definitely on the list of chicken dishes to make agsin+!
Ella Brackett
This was delicious! A new "go to" for this time of year when we have lots of zucchini and tomatoes from the garden. I added chopped onion to the zucchini, and sprinkled fresh basil when I took it out of the oven, but otherwise, pretty much followed the recipe. Didn't measure any of the spices, just sprinkled on. Thanks!
Lisa
My pleasure Ella! It's a great way to use those fresh garden produce.
Ashley
I added black beans and corn and used stewed tomatoes with jalapeno. Came out soo good.
Lisa
Those are good adds if not worried about carbs.
Jeanette
Hi, at the end of the recipe it shows 4g carbs but the nutritional analysis says 2g carb. Can you let me know which is correct. Thank you
Lisa
Notes are carried over from an old calculation. Deleted that since it's in the label.
Rosie
I added onion And squash in it...super yummy
Lisa
Sounds tasty!
Sara Foodie
Just made this for the first time and it was delicious! I added noodles and marinara for my non-dieting people in the home! So yummy, highly recommend.
Lisa
Great idea for getting more servings out of the dish!
Peggy
Do I cover in oven?
Lisa
I don't cover it.
Leah
Huge fan of your work! What size pan did you use?
Lisa
I use a regular 9x13-inch pan.
Steve
Mmmm.... good and REAL easy!!. I used 2 fresh tomatoes from the garden which increased the moisture and helped keep the chicken moist. I also used quite a large courgette (zucchini) from the garden.
Before frying the courgette, I sautéd a small red onion with garlic. Added fresh basil, oregano and parsley. Plenty of seasoning too! It's a great dish topped off with the mozzarella. Thanks.
Mandy Smith
This was so delicious. I'm not a big great tomato fan, and almost used a can of roasted tomatoes, but decided to use other fresh veggies I had on hand. I used onion and red bell pepper with The zucchini. The rest of the recipe I followed exactly and it was one of the best dinners I've made in a long time. And super easy too. I served it with homemade mashed potatoes. Delicious dinner!!!
mayra talamantez
Very delicious and tasty dish!!! Will definitely make it again and plus I will score big with the in-laws if I make it for them lol thanks for the easy recipe, made it exactly as it's posted. The oregano tasted very good!
Lea
Just made this recipe; fabulous! The instructions were very clear and I followed them exactly. It worked perfectly. The only Step I added was that I lightly scored the raw chicken breasts and marinated them. Thank you so much!
Lisa
Glad it worked out. Scoring the chicken does help with marinating.
Lisa Schwall
came out awesome, I use all my tomatoes an zucchini from my garden, I added in a little fresh basil and oregano. Came out pefect
Lisa
Awesome! It is a wonderful way to use the garden veggies.
Sarah
Hey, thanks for the ideas, could you freeze this ? Or how long could it keep in the fridge ?
Lisa
The zucchini might get mushy if frozen. It should keep in the fridge for about a week or so.
Sherry Z
Wondering, can it be freezer?
Lisa
The zucchini might get mushy in the freezer, but other than that, it should be okay.
Sherry Z
Made this last night, super easy and super yummy! I didn't have any mozzarella cheese so I used Colby jack cheese.
Lisa
Colby jack is a great cheese to use too!
Kat
It was good. I used Fresh Garden Tomatoes. I think fire-roasted would also be delicious. I think the next time I make it I will either or Shred the chicken
Lisa
Great ideas!
Felisa
Very easy, very tasty, very healthy. I wouldn't change the recipe at all!
Lisa
Thanks for the review!
Karen
I'm new at this. Did you use 1 lb chicken?
Lisa
Yes. Two boneless chicken breasts are about 16 ounces or 1 pound.
Christine
Well my dear child ate seconds of this (including eating the zucchini). So thank you!
I subbed the tomato and herbs for a can of fire-roasted diced tomatoes with oregano & basil. Added red pepper flakes.
Lisa
Love the added spice!
Angie
I struggle with finding low carb recipes my finicky husband will like...he has a rather unadventurous palate. I'm going to make this dish for dinner tonight and will report the outcome (I'm sure I'll love it...what's not to love)!
Lisa
I'm glad I'm not the only one dealing with a picky hubby. Mine has eased up a bit because he knows the low carb dishes are much healthier for him.
Linda
I just made this today and it was absolutely delicious!!! I will definitely make this again! You are a wonderful cook. Thank you for sharing!!
Lisa
Thanks Linda! Glad you liked it.
Brenda
Hi,
I love anything that looks like it came from a gourmet restaurant and this dish looks like it belongs at Olive Gardens. Thank you for the recipe I hate a lot of zucchinis and I don't know what to do with them.
-Brenda