This casserole below is a yummy way to use up leftover mashed potatoes
Fry a package of bacon and cut into bite sized pieces. Next add water to the pan of bacon and bacon drippings and thicken with a gravy thickener(I use Knorr brand) Add some garlic and pepper to taste and pour over the left over mashed potatoes. Top with grated cheddar cheese and melt in oven for about 20 minutes or so:) Serve with garlic bread and a salad. Enjoy!
( I also make this with previously sliced potatoes that are sliced ~into thin circles~ and boiled slowly for about 4 minutes~ )