A versatile, easy recipe for leftover mashed potatoes and ham. Serve with steamed green beans, cauliflower, corn on the cob, or broccoli. Concerning the seasonings, the exact cheese, the use of green onion, or maybe bacon instead of ham, feel free to experiment. I also think if you had ham and some sort of leftover potato casserole you could use the same technique. In any case, relax and have fun with your leftovers!