1 (6 ounce) can pizza sauce
1/2 cup water
3 (4 ounce) cans tomato sauce
1 (16 ounce) package shredded mozzarella cheese
1 (16 ounce) container pepperoni sausage
1 (8 ounce) package shredded mozzarella cheese
1 (8 ounce) package instant pizza sauce
1 (3.5 ounce) can sliced mushrooms
1 cup shredded mozzarella cheese
1 (12 ounce) package shredded mozzarella cheese
8 ounces shredded mozzarella cheese
1/2 cup grated Parmesan cheese
In a large saucepan, combine pizza sauce, water, tomato sauce, cheese, sausage, mozzarella cheese, mushrooms, mozzarella cheese, and pizza sauce. Bring to a boil, reduce heat to low, cover, and simmer 30 minutes.
Remove from heat. Stir in pizza sauce mixture, pepperoni sausage, mozzarella cheese, mushrooms, mozzarella cheese, and pizza sauce. Pour into the 5-inch-square baking dish.
Bake in preheated oven for 45 minutes.