Hot Potato Salad Casserole(Even People Who Hate Potato Salad Like This!)  
["8 potatoes, boiled, peeled and grated (don't overcook and use a food processor)", "10 oz. sharp Cheddar cheese, grated", "1/2 c. onion, chopped", "1 c. mayonnaise (regular or even low-fat)", "1/2 c. milk"]
["Gently mix together in a very large bowl the potatoes, cheese and onion.", "Shake mayonnaise and milk in a jar.", "Gradually pour mayonnaise/milk mixture over potato/cheese mixture and toss gently, adding salt and pepper to taste.", "Spread in a large (at least 9 x 13-inch) baking dish and top with crumbled bacon and sliced olives. Can be made a day ahead and stored in the refrigerator.", "Bake 1 hour at 325\u00b0.", "These are also great as leftovers."]
["potatoes", "Cheddar cheese", "onion", "mayonnaise", "milk"]