Spread one-third of meat sauce in a lightly greased 11- x 7-inch baking dish; layer with 3 noodles and half each of ricotta cheese and mozzarella cheese. (The ricotta cheese layers will be thin.) Repeat procedure; spread remaining one-third of meat sauce over mozzarella cheese. Slowly pour 1/4 cup hot water around inside edge of dish. Tightly cover baking dish with 2 layers of heavy-duty aluminum foil.