Knead the flour, sugar, butter in flakes, baking powder and egg into a smooth shortcrust pastry.

Use floured hands to press half of the dough into the greased pan on the bottom and leave to cool

Grease the edge as well and form the remaining dough into a thin roll, place on the edge of the springform pan and press up a 3 cm high edge with your fingers

Peel the apples and cut into small pieces and spread on the dough

Boil the pudding, let it cool and stir in the 2 cups of sour cream and then pour over the apples.

Make crumble from flour, baking powder, sugar, V-sugar and margarine and spread over the pudding mixture.

Bake in a preheated oven at 160 ° for about 50 - 60 minutes.