Let thaw the puff pastry, If it is frozen in 30-60 minutes. On a lightly floured surface, spread the dough to size of 30 x 30 cm. Cut it in 9 square of 10 cm. on each side. Mix the hazelnut with egg. sugar and rum.
Put a bead of this hazelnut filling in the center of each square of dough. Spread one side of each square with whipped egg yolk. fold the opposite side over this. cut this edge of the mass at regular intervals and a little separate cuts so that it resembles a comb.
Wet a tray of oven with cold water. Place on this convenient hazelnut Combs distance from one another and brush the surface with beaten egg yolk. Leave the cakes 15 minutes.
Heat oven to 230 degrees. Boil the Combs 15-20 minutes to half-height. Allow them to cool on a wire rack.
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