I love this gluten free breakfast casserole because it so versatile! And my guests have raved about it, especially when made with bacon. You can skip adding meat altogether or replace the gluten-free sausage with gluten-free bacon or gluten-free ham. You can also skip the onion, add bell pepper or add more cheese. I have made a single recipe in a 7″ deep dish pie pan and a 9×9″ glass casserole dish. I have also 1.5 times the recipe in a 9×13″ glass baking dish. This makes a great brunch dish. Be creative with this one and enjoy!