Knead the flour, 1 egg yolk, cream, fat, fructose and lemon peel into a smooth dough. Cover and chill for approx. 1 hour
Separate 3 eggs. Mix quark, egg yolk and sauce powder until smooth. Beat egg whites and 1 pinch of salt until stiff and fold in
Roll out 2/3 of the dough to a rectangle (approx. 20 x 40 cm) on a lightly greased fat pan. Bound the open side with a stable rail made of aluminium foil. Roll out the rest of the dough to a square (approx. 20 x 20 cm) and cut into narrow strips
Spread the curd mixture on the floor. Place strips of dough on top. Bake in a hot oven (electric cooker: 200 °C/ convection oven: 175 °C / gas: level 3) for 35-40 minutes