This recipe is basically just a way more fun version of eating your morning oatmeal.
Combine oats, starch, salt, cinnamon, and baking powder in a blender or food processor and pulse until powdered. Add the banana, vanilla and milk and pulse until it's a smooth batter.
Heat a waffle iron and spray lightly with cooking spray if the non-stick surface isn't very good. Cook waffles to your desired level of crispiness. I love crispy waffles but you can definitely make them soft. Also, be sure not to open the iron too soon or you'll rip the waffle.
Depending on the size of waffle iron this recipe will make about 8 large waffles or 16 miniature ones like the ones in the photos. You can get the Mini Waffle Maker here.