Cut butter in small pieces and mix with flour, add curd cheese and salt, knead rapidly to a dough.
Place in fridge over night.
Peel apples, remove core and cut in fine leafy pieces. Mix in sugar, cinnamon and raisins.
Divide dough in 2 equal portions. Roll out (rectangle form) and place apple mix in the middle.
Brush the edge with water and fold in. Press the edge firmly.
Place on baking tray. (with baking paper) Joint part up. Brush with egg yolk-milk mix.
Bake in preheated oven at 180° C for about 30 - 35 minutes.
Tastes best when slightly warm, but cold is great too.