Preheat the oven to 350 degrees.
Boil the cabbage whole in a large pot on the stove with the lid on until the cabbage begins to become tender, but still has a bit of strength to its leaves.
Place the cabbage into cold water and let sit while you prepare the filling.
Add the ground beef, onion, chopped parsley, minced garlic, Italian seasoning, egg and salt and pepper to taste to a mixing bowl, and knead with your hands until completely combined.
Place the tomato sauce, sweetener if preferred and garlic powder in the bottom of a 9x13 casserole dish and stir to combine well.
Separate 8 of the larger outside leaves from the head of cabbage and cut a v shape in the bottom of each one to remove the toughest part of the stem.
Place a bit of the filling into the center of each leaf, fold up the bottom, fold in the sides, and fold down the top of the leaf to form a meat filled pocket.
Add the filled leaves open side down into the tomato sauce in the bottom of the baking dish.
Chop up 2 cups of the remaining cooked cabbage and sprinkle it around the cabbage rolls in the baking dish.
Cover the baking dish with aluminum foil and bake for 60 minutes.