Preheat oven to 350°. Toss hot rigatoni, 1-1/2 cups mozzarella, ricotta, parmesan and 1/2 jar Pasta Sauce; turn into 13 x 9-inch baking dish. Evenly pour on remaining Pasta Sauce.
Bake covered 30 minutes or until heated through.
Top with remaining 1/2 cup mozzarella and let stand until cheese is melted.