If you spend time baking a casserole, be it macaroni and cheese, lasagna, meatloaf or anything else, be sure to let it rest for a few minutes before cutting into it. (Don't worry that it will get cold; it's been sizzling away in a hot oven for quite some time, and there is plenty of heat circulating in the pan to keep it warm.)

Letting a casserole rest for 10 minutes or so means that the proteins and starches will have time to set, making for a more stable mixture before you cut it into portions. If the casserole is too hot, it will be harder to manage, fall apart more easily, and won't taste as good.