Hi Mary, There are a couple things you can do with leftover mashed potatoes. For an entrée, try my Warming Shepherd’s Pie which is a ground beef pie topped with mashed potatoes. (The recipe calls for using instant mashed potatoes, but you can use leftover potatoes.) For a tasty side dish, I like to make mashed potato cakes. Simply form the mashed potatoes into hockey-puck-sized cakes, then dip them in beaten egg, then dried bread crumbs. Fry them up in some vegetable oil in a nonstick pan over medium heat until brown and crispy – delicious! (Hint: If you find that the potatoes are too loose to easily form into cakes, try putting the mashed spuds in the freezer for a few minutes, or mix a tablespoon or two of flour into the potatoes. To avoid this the next time you want to make leftover mashed potato cakes, plan ahead when you make the potatoes for mashing: After boiling and draining the potatoes, return them to the empty pan and heat them over medium heat, stirring, for a few minutes to remove some of the excess moisture – and don’t add too much milk to the potatoes when mashing.)