A casserole is a one-dish meal baked in the oven. Just throw the ingredients into a large, deep pan and let the oven do the work. Load in your favorite veggies and meat for a delicious, gooey meal. When preparing baked pasta dishes, be careful not to overcook it. In fact, aim for al dente, which is slightly undercooked, so it doesn't become mushy while baking in the oven. Try one of these easy-to-make baked pasta and casserole recipes.