Peel, quarter and core the apples. Cut into small cubes and immediately sprinkle with lemon juice
Bring the apple cubes, 5 tablespoons of water and 2 tablespoons of sugar to the boil and steam over a low heat for about 10 minutes. Let the compote cool down
Put the quark, milk, oil, 90 g sugar and salt in a bowl. Mix flour and baking powder, add and knead everything into a smooth dough. Divide dough into 8 pieces and roll out into rectangles (approx. 14 x 16 cm). Separate the egg. brush the edges of the dough with egg white
Spread 2 tablespoons of apple compote on each half of the rectangles. Cut the other halves several times and fold over the filling. Press on the edges
Spread apple pockets with whisked egg yolk. Place on a baking tray lined with baking paper and bake in a preheated oven (electric cooker: 200 °C / convection oven: 175 °C/ gas: level 3) for approx. 15 minutes. Let cool and dust with icing sugar