Baked ziti is one of those dishes that instantly ... top and top with remaining mozzarella and pecorino Romano. Bake, uncovered, until the cheese has melted and browned, 15 to 20 minutes.

Yellow onion >> white onion. Parmesan >> grana Padano or pecorino Romano. Mozzarella >> Muenster or other similar melty cheese. Rigatoni >> ziti, cavatappi or other short, tubular pasta shape.

Stir the sauce, 1 cup mozzarella cheese and ziti in a large bowl. Spoon the mixture into a 2-quart shallow baking dish. Sprinkle with the remaining mozzarella cheese and Parmesan cheese.