Chop the ginger finely. Dice fat. Pour flour into the mixing bowl, make a depression in the middle, add egg, sugar, salt, vanillin sugar, cold fat in flakes and ginger on the rim.
Work vigorously with the dough hooks of the hand mixer. Then knead quickly to a smooth dough with cool hands. Cover and put in a cool place for about 1 hour. Roll out the short pastry on a floured work surface to a rectangle (approx. 30x40 cm) and cut approx. 50 lozenges with a wheel.
Place the lozenges on 2 baking trays lined with baking paper. Press patterns into the lozenges with a meat tenderizer as desired. Bake the trays one after the other in a preheated oven (electric: 175°C/ gas: level 2) for 18-22 minutes.
Let the cookies cool down on a cake rack. Stir icing sugar and orange juice until smooth. Spread the rhombs with the icing and sprinkle with orange julienne as desired.