Preheat waffle iron and grease it yours calls for it. You can use butter or coconut oil or nonstick cooking spray. Check your manufacturers instructions for guidance. Note I used a Dash mini waffle maker which is the perfect size for this recipe.
In a large bowl beat the eggs and then add the mashed potatoes, cheddar, mozzarella and Parmesan cheese. Mix well to make the batter mixture.
Add about ¼ cup of a batter to the center of preheated waffle iron and cook for a couple of minutes until golden brown and has crispy edges. Take out and set on a plate then continue with the rest of the batch.
When finished, stack 1 or two waffles and top with bacon, green onions, shredded cheddar and sour cream if using. Or you can use these as an appetizer and serve with a dipping sauce like ranch, sour cream, French onion dip, etc.
