Leftover Mashed Potato Pancakes

Ingredients (6)

• + 2 cups mashed potatoes add to pantry
• ✓ 1 egg
• ✓ 1 teaspoon ground black pepper
• + ¼ cup dry bread crumbs, or as needed add to pantry
• ✓ 1 tablespoon oil
• + 1 tablespoon butter add to pantry