Waffled Mashed Potatoes With Bacon, Scallion, and Cheddar Recipe

Waffling your leftover mashed potatoes gives them a second life that may be even better than their first. Don't ask me how I've managed to use the waffle iron to prepare a lengthy list of foods—churros, s'mores, ramen—without waffling mashed potatoes. Mashed potatoes are closer to waffles than any …