This was shared by a friend and I don't know the original source. It's pretty flexible, so make it your own. I've substituted mild Italian chicken sausage because it's leaner (from Whole Foods) and tried pesto with fresh mozzarella and roma tomatoes. Use your imagination!
The basic recipe calls for about a pound of mild Italian sausage. Spread onto a pizza pan or cookie sheet (about 1/4 inch thick). Bake at 450º for about 10 minutes. Add toppings. First layer cheese - shredded mozzarella/romano or provolone mix, then add things like mushrooms, fresh spinach, eggplant, banana peppers, onions, olives, etc. Add a layer of chunky tomato sauce (check for GF), and a can of diced tomatoes or fresh sliced roma tomatoes - Bake another 10-15 minutes and enjoy!