Put flour, baking powder, hazelnuts, gingerbread spice, grated lemon peel, sugar and egg in a bowl. Spread the fat in flakes on top and knead everything with the dough hooks of the hand mixer.
With cool hands quickly work into a smooth short pastry. Cover and chill for approx. 1 hour. Pass the icing sugar through a sieve. Knead marzipan and 30 g icing sugar and divide into three parts. Leave one part white, the other pieces yellow and red.
Knead the short pastry again and roll out 3-4 mm thin on a floured work surface. Cut out 18 stars with a star shape (approx. 8 cm Ø). Spread on 2 baking trays lined with baking paper and bake in the preheated oven (electric oven: 200 °C/ gas: level 3) one after the other for approx. 15 minutes.
Let it cool down. Roll out the marzipan pieces thinly on icing sugar and cut them out with cookie cutters (face 3-3.5 cm Ø, beard approx. 4 cm Ø, caps with the star shape). Cut out small stars from the remaining marzipan as desired.
Mix the remaining icing sugar and lemon juice to a firm glaze. Put it into the freezer bag and cut off a small corner. Stick faces, beards, caps and sugar beads with the icing on half of the stars and spray moustaches on the faces.
Spray the rest of the casting as two thick blobs (feet) on the remaining stars. Cut off two adjacent teeth of each star a little bit and press the stars into the cast and possibly support them from behind.
Sprinkle the feet with small sugar pearls and let them dry for 20-30 minutes. Results in 9 Santa Claus stars.