Make Ahead Mashed Potato Casserole
["8 large potatoes", "1/2 stick oleo or butter", "2 Tbsp. onion salt", "1 pt. sour cream", "1 c. grated cheese"]
["Cook potatoes; mash and add oleo or butter, onion salt and sour cream.", "Put in baking dish; refrigerate overnight.", "Put in 350\u00b0 oven.", "Sprinkle on grated cheese and bake for 1 hour."]
["potatoes", "oleo", "onion salt", "sour cream", "grated cheese"]