This gluten-free pizza crust has been my most successful so far. Here is the recipe: http://minimalistbaker.com/the-best-gluten-free-pizza-crust-sauce/
For margarita style pizza, I just do an olive oil and minced garlic base. Then I add mozzarella and cheddar cheese and the sliced tomatoes. Since I can’t have basil right now, I’ll do some fresh parsley. And…Ta-da!