Mashed Potato Casserole
["8 large potatoes", "2 Tbsp. onion salt", "1 pt. sour cream", "4 Tbsp. butter", "1 c. grated cheese (Cheddar)"]
["Peel and cook potatoes until soft.", "Mash with onion salt and sour cream.", "Add butter to mixture.", "Place in 2-quart casserole dish and top with cheese.", "Refrigerate overnight.", "Bake at 350\u00b0 for one hour."]
["potatoes", "onion salt", "sour cream", "butter", "grated cheese"]