The World's Best Potato Casserole

Description
Contributed by Catsrecipes Y-Group
 * Source: my old recipes

Ingredients

 * 1 x 2 lb pkg. of frozen hash brown potatoes, southern-style
 * 2 cups of sour cream
 * 2 cups grated cheddar cheese
 * 1 can cream of mushroom soup
 * 1 medium sized diced onion

Directions

 * 1) Mix hash browns with sour cream, cheddar cheese, cream of mushroom soup and onion.
 * 2) Bake at 350°F for 45 minutes (about) a little longer, if you forget to defrost the spuds first.