Baked in a springform pan allows for the rigatoni to stand up straight, ready to be filled with ricotta and topped with marinara (or pizza sauce), mozzarella, Parmesan, and pepperoni. After some ...

or until melted. DRAIN pasta; return to pan. Add zucchini mixture, spinach, Parmesan and 1/2 cup mozzarella; mix lightly. Spoon into 2-qt. casserole sprayed with cooking spray; top with remaining ...