Knead the ingredients for the dough until smooth and chill for approx. 30 minutes. Then divide the dough into 2 equal portions. Preheat the oven to 180 ° C (top / bottom heat).
Mix the ingredients for the filling. Roll out half of the dough on baking paper into a rectangle (approx. 40 x 30 cm) and place on the baking sheet. Spread the filling evenly on top.
Dust a piece of cling film with a little flour, then roll out the other half of the dough into a rectangle and place it on the filling. Carefully peel off the foil and bake the whole thing for 20 minutes at 180 ° C.
For the glaze, beat 1/2 egg white until stiff, stir in the powdered sugar and orange juice. After baking, distribute the glaze evenly on the dough and allow to cool. Then cut into small rectangles.