Thanksgiving Leftovers Recipe: Mashed Potato Puffs – Mashed Potato Puffs: 2 Cups Mashed Potatoes. 3 Eggs, Beaten 3/4 Cup Grated Parmesan Or Gruyere, Divided 1/4 Cup Minced Chives 1/4 Cup Diced Ham (optional) Salt And Pepper; Heat The Oven To 400°f Lightly Grease The Cups Of Muffin Tin, Or A Mini-muffin Tin. Bake 20 Mins