Hashbrown Casserole 
1 lb bag frozen shredded potatoes
2/3 cup finely-diced onion
2 cups shredded cheddar cheese
1 can condensed cream of chicken soup
16 oz sour cream
salt and pepper to taste
Mix all ingredients together, place in an oven-safe casserole dish and bake covered in a 350 degree for 30 minutes. Remove cover and return to oven for another 30 minutes until brown.