A lovely way to use hard-to-reheat potatoes and gravy, and good alternative to the same-old leftovers after Thanksgiving. Someone should try it with bacon bits under the cheese.
Put the ingredients in the order given, layered: turkey, gravy, potatoes, and cheese. Try not to squish the potatoes into the gravy, but this is a casserole, so there isn't any worry if you do a bit. The cheese adds a nice bite and flavor, so try not to skip out on it.