I searched the internet for a recipe to use up some left over mashed potatoes. This is what I found and made. It's simple, easy, and a great way to use up left over mashed potatoes. This is one recipe that I always come to when I have leftover mashed potatoes. I once made these and I wasn't serving them right away, so I let them cool down then I froze them. A few weeks later I removed them from the freezer let them defrost and they were just as good. I have even added leftover chicken pieces and leftover meatloaf to this and it was yummy.