Roll up a roll of puff pastry and cover with ham slices. Grate the parmesan and spread on top. Also roll up the second roll of puff pastry and brush with beaten egg. Place this sheet of puff pastry on top of the other puff pastry with the ham. Cut into thin strips (2 cm wide, 10 cm long) with a sharp knife. Place the strips in a spiral on a baking tray lined with baking paper.
Makes approx. 2 trays full. Bake at 220 ° C for about 10-15 minutes.