Pierogi Casserole - cooking recipe

Ingredients

10 to 12 potatoes, boiled and mashed or instant mashed potatoes (12 servings)
1 pkg. bow tie noodles
1/2 lb. Cheddar cheese
1/2 lb. American cheese
2 1/2 sticks butter
3 onions, diced

Preparation

Cook noodles; drain and add 1 stick of butter while hot. Shred cheese.
Mash potatoes and add cheese while hot.
Cook diced onions in butter.
Using a 9 x 13-inch baking pan, layer bow ties, mashed potatoes and onion-butter mixture.
Repeat, ending with bow ties.
Pour remaining butter and onions over all.
Salt and pepper to taste.
Cover with foil and bake at 350\u00b0 until heated.