Jeanine Donofrio on Instagram: "Leftover mashed potatoes? Give them a makeover and turn them into these crispy, golden mashed potato pancakes. They’re crunchy on the outside, fluffy in the middle, and packed with savory flavor. Here’s how to make them: Ingredients * 2 cups leftover mashed potatoes * ⅔ cup grated cheddar cheese * 3 scallions, chopped, plus more for garnish * ¼ cup chopped fresh parsley * 1 large egg * ½ teaspoon onion powder * Pinch cayenne pepper * ½ cup all-purpose flour, spoon