Preheat the oven to 180 ° C. Roll out the puff pastry and cut across into 4 equal pieces (pastry wheel or pizza wheel). Lay the salmon in layers with the cheese spread on part of the puff pastry. Brush the edges with egg, fold the dough together and press firmly. Brush the tascherl with egg and bake at 200 ° for about 20 minutes until golden.