Roll out the puff pastry on a cutting board and cut into strips.
Peel the bananas and cut them down the middle. Fill the middle with hazelnut cream.
Wrap them in puff pastry strips and place them on the baking tray lined with baking paper.
Brush the banana rolls with egg wash and sprinkle with sugar. Transfer to the oven and bake at 190°C/374°F for 25 minutes.
Serve the banana rolls all together on a serving platter.
