This comforting baked pasta feeds a crowd and is an easy way to upgrade everyday spaghetti with meat sauce.Once baked, the spaghetti casserole slices into neat squares, and the layer of ricotta and Parmesan filling give itthe rich flavor of a lasagna. Feel free to play around with the recipe, swapping in Italian sausage or groundturkey for the ground beef and sautéing leftover vegetables and adding them to the sauce. If you’re planning inadvance, you can assemble the casserole (through the end of Step 5) and store in the refrigerator, covered, untilready to bake.