Steep Estate Baked Potato Casserole

Description
This recipe came from an estate sale. I obtained it when I purchased the family collection from the Steep Estate in Elmo, Texas in 1989.
 * Contributed by Catsrecipes Y-Group

Ingredients

 * 8 cooked peeled and diced potatoes
 * 1 pound American cheese sliced in strips
 * 1 cup mayonnaise
 * ½ cup chopped white onion
 * 1 teaspoon salt
 * 2 teaspoons freshly ground black pepper
 * ½ pound fried bacon drained and copped

Directions

 * 1) Combine potatoes, cheese, mayonnaise and onion and place in casserole dish and top with bacon.
 * 2) Bake at 325°F for 1 hour then season with salt and pepper.