Leftover Mashed Potatoes
Mix mashed potatoes with an egg, and spread evenly into a greased pie plate. Bake at 350F (180C) for 10 minutes. Fill with your favourite quiche mixture and bake as usual. Instant potato pie crust.
Stir leftover mashed potatoes into vegetable soup to thicken it.
Add leftover mashed potatoes to your usual meat loaf or meatball mixture.
Mix with other leftover vegetables (chopped broccoli, carrots, peas, whatever), add an egg and some bread crumbs, and form into patties or nuggets. Pan fry or bake. Ta da – croquettes!