I'm not sure if that will work. I have cooked it in a covered grill as it's similar to a convection oven.

You should be able to but typically, you'll need about 1/4 to 1/3 less coconut flour than almond flour. You may also need to add additional liquid.

Can I sub coconut flour for almond flour in this? My husband is deathly allergic to
Eggs n nuts

It's usually the egg whites that are the issue. But I found it impossible to give up eggs. I'm happy to hear you've made it almost a year without them. It gives me some encouragement to try again. The egg-free keto brownies I made actually came out really good and I also made egg-free pumpkin cookies.

I have a pizza stone for my grill and it does cook well as the grill is basically a convection oven when the lid is closed.

The psyllium should absorb the liquid (I used whole husks). But you can add a little more if it doesn't.

I had the exact same issue. Mine came out clumpy. There was some liquid after i melted the mozzarella cheese.. should i have dumped the liquid? I felt like the extra liquid did not allow the dough to come together either, but I am really note sure. Any pointers or a is there a video of this creating process that I may have missed?

I bake it on a pizza stone and it is crisp.