When the dough is ready, divide it into two equal parts for easier preparation.
Roll out half of the dough into a long rectangle on kitchen cloth covered with some flour.
Coat dough with half of the hazelnut filling and roll.
Stretch the roll a little more and then cut it with a sharp knife (or sewing thread) so that you get about 25 small rolls.
Repeat the same procedure with the other half of the dough.
Cover the rolls on a baking sheet with a kitchen cloth and leave them to rise for another 15 minutes.
Bake in a preheated oven at 180°C for about 15 minutes.
Sprinkle with powdered sugar.
Keep rolls in a closed container, so they stay soft and fluffy. You can also freeze them, if you want.