This three-cheese and onion pasta bake is a comforting and cheesy dish that is perfect for a cozy dinner. The pasta is cooked until al dente, then mixed with a creamy sauce made from three types of cheese: cheddar, mozzarella, and Parmesan. Caramelized onions add a sweet and savory flavor to the dish, while breadcrumbs provide a crunchy topping. Baked until golden and bubbly, this pasta bake is a crowd-pleasing comfort food that will satisfy your cheesy cravings.