When using leftover turkey in a recipe, remember that it just needs to be reheated because it's already cooked. Prepare other ingredients first, according to your recipe. Then add the leftover turkey. Stuffing and gravy keep two days in the refrigerator. Stuffing can be frozen for one month, and gravy up to six months.

Griddle the Sandwiches: Heat a large, heavy skillet over medium heat. Add the sandwiches (you will probably have to cook them two at a time), and cook for about 3 minutes on each side, until the outside is nicely browned, and the cheese has melted. Serve: Cut in half and serve hot.