Preheat oven to 400°. Combine Pasta Sauce and water in large bowl. Stir in ricotta and Parmesan cheeses, then uncooked ziti.
Evenly spoon ziti mixture into 13 x 9-inch baking dish. Cover tightly with aluminum foil and bake 55 minutes.
Remove foil and sprinkle with mozzarella cheese. Bake uncovered an additional 5 minutes. Let stand 10 minutes before serving.
TIP: Add a Mexican twist to this yummy recipe by using Pepper Jack cheese instead of mozzarella and tossing in some corn.