The best recipe I have found that takes care of leftover mashed potatoes. Cheddar Cheese Bacon and Onion Potato Cakes are a great way to make sure every scoop of those leftover mashed potatoes are used. Barry C. Parsons of Rock Recipes. Leftovers are not a favorite around my house, but we all love these cheddar cheese potato cakes and very seldom are there any left!
The mashed potatoes get blended with some red onion, garlic and green onions as well as some crisp-cooked bacon and diced cheddar which melts to gooey pockets right inside the potato cake. They are then fried to a golden crispy exterior while retaining a creamy, delicious inside.