Defrost the dough sheets side by side. Cut plums into slices and bring to the boil with juice. Bind with binding agent. Let the compote cool down a little
Stir the jam, lemon peel and juice until smooth. Roll out dough sheets to rectangles (approx. 13 x 26 cm), cut in half crosswise. Spread with jam. Fold each 2 opposite corners towards the middle. Place compote on top
Place the particles on a cold rinsed baking tray. Whisk the egg yolk and 1 teaspoon of water, brush the dough. Bake in the preheated oven (electric cooker: 200 °C / convection oven: 175 °C / gas: level 3) for 10-12 minutes. Let cool off. Chop the pistachios, sprinkle on the Copenhagen