Directions:
To make dough: in a small bowl, dissolve sugar in 1 cup warm water; In a separate small bowl, mix yeast, 1/2 cup flour and 1/2 cup warm water. Mix together and let rest in bowl for about 20 minutes, until frothy.
Preheat oven to 450 degrees F (230 degrees C). To make filling: In a large bowl, combine the sausage, mozzarella, Parmesan, pepperoni, onion, bell bell pepper, oregano and garlic. Mix well.
Press half the dough into the bottom and along the sides of a lightly greased deep dish. Bake crust for 4 minutes in preheated oven, then add filling mixture to bottom crust and cover with top crust; seal edges together with fingers, trimming off excess. Cut top crust open to allow steam to escape during baking; top with tomato sauce.
Bake for 45 minutes on bottom rack at 230 degrees C (450 degrees F), or until crust is golden brown. Remove from oven and let cool 5 minutes, then slice and serve.