1. Fill a large bowl with water and place two damp paper towels on a cutting board. Soak a rice paper wrapper in water for approximately 10 seconds (do not leave it in too long as it will continue to soften as you work), then place it on the damp paper towel.
2. Cut the rice paper in half down the middle. Place about a teaspoon of Nutella in the middle of each rice paper half, topped with a slice of banana and a pinch of peanuts.
3. Fold the sides over the filling to create a triangle shape. Then, flip the dumpling over and fold any excess rice paper onto the other side.
4. Place the dumplings directly into a cold pan drizzled with avocado oil. Turn the heat to medium and cook for about 5-6 minutes on the first side, and 2-3 minutes on the second side, until golden brown and crispy. Check every minute or so to ensure they are not burning as different pans heat at different rates.
5. Sprinkle with powdered sugar and enjoy! (For a vegan modification, substitute chocolate chips for Nutella.)