When I make smashed taters I always peel and cut extras, so I can use the extras for a side dish of cheese taters.
I use the extra smashed taters, about 5 cups. (16 oz.) of chedder cheese (or cheese of your choice) 2 lg. eggs, garlic and onion powder to taste, mix well place in a baking pan, and bake @350 F. for 45 minutes or until the cheese is melted