15 oz. Ricotta cheese
1/4 c. grated Parmesan cheese
12 oz. Mozzarella cheese, grated
1 pkg. frozen spinach (cooked and drained)
Salt and pepper to taste
Sweet Italian sausage or ham if desired
1/2 recipe pizza dough (see my pizza dough in bread section)

Combine the cheeses and spinach in a bowl. Season to taste and add meat if desired. Flatten pizza dough into a round. Fill half the dough with the cheese mixture. Fold dough over and seal edges with a little water and press with a fork. Bake at 400 degrees about 20-25 minutes. Serve with spaghetti sauce.