In a large mixing bowl, whisk together the flour, eggs, milk, melted butter, sugar, and salt until the mixture is smooth. Let it rest for about 15-20 minutes at room temperature.
Heat a non-stick skillet over medium heat. Lightly grease it with butter or oil.
Pour about 1/4 cup of the batter into the center of the skillet and quickly swirl the pan to spread the batter evenly across the bottom. Cook for about 1-2 minutes or until the edges start to lift and the bottom is lightly golden.
Flip the crepe using a spatula and cook the other side for another 1-2 minutes. Remove it from the skillet and repeat the process with the remaining batter. Stack the cooked crepes on a plate.
To assemble, spread a generous tablespoon of Nutella onto half of each crepe, then add a few banana slices over the Nutella.
Fold the crepe over the filling in half, then fold it in half again to create a triangle shape.
Serve the crepes warm, topped with a dollop of whipped cream and garnished with fresh mint leaves.
Notes
Arrange the crepes on a large plate, sprinkle with powdered sugar, and drizzle some additional Nutella on top for impact.