1. Microwave your mini waffles for about 45 seconds, just enough to defrost them, then separate each mini waffle.
2. Spread a thin layer of Nutella on one side of every waffle, then add a slice of banana to half of the waffles.
3. In a skillet coated with cooking spray, place the waffles with bananas on them over medium heat for 2 to 3 minutes. Then add the other waffle piece on top making a sandwich and flip to brown the other side.
4. Cook another 2 to 3 minutes, let cool and serve!