Let the roll of dough rest at room temperature for about 10 minutes. Mix poppy seed filling, egg yolk and orange peel. Roll out the puff pastry on the work surface and spread the poppy seed filling on top.
Roll both long sides up to the middle. Carefully wrap the dough in foil and place in the freezer for approx. 30 minutes.
Line four baking trays with baking paper. Cut the dough into approx. 80 slices (each approx. 1⁄2 cm thick) and place them on the baking trays. Bake one after the other in a preheated oven (electric cooker: 175 °C/circulating air: 150 °C/gas: see
manufacturer) Bake for 20-25 minutes. Let it cool down.