Sour Cream Potato Casserole
["2 lb. bag hash brown potatoes", "1 large onion, chopped", "1 stick butter", "1 can cream of celery or mushroom soup", "1 pt. sour cream", "black pepper", "2 c. or 1 lb. Velveeta"]
["Saute onion in butter until tender.", "Fold all ingredients into potatoes, except 1 cup cheese.", "Pour into 3-quart casserole and bake at 325\u00b0 for 1 hour.", "Top with reserved cheese and return to oven until cheese melts."]
["potatoes", "onion", "butter", "cream of celery", "sour cream", "black pepper", "Velveeta"]