Pre-heat oven to 400 F and prepare 2 baking sheets with parchment paper. Set aside

Unwrap pastry, if it's too cold and starts to crack let it come at room temperature for a few more minutes

Place the first sheet of pastry over the counter and spread Nutella evenly, making sure it goes right into the edges. Sprinkle with hazelnuts on top. Cover with the second sheet of pastry, making sure everything is evenly covered. You should have one neat rectangle with two layers, and the filling should be between both of them

With a pizza cutter wheel or a knife, cut the dough into 1/4 inch wide strips, twist two strips together and roll them into a knot (watch enclosed video), wet the end of the strips with water and "stick" them to the bottom of the knot

Place them in prepared baking sheets 1.5 inches apart and bake for 15 minutes or until golden. Let them cool completely, sprinkle with sugar and enjoy!