For the yeast dough, stir the ingredients together, roll out and line the bottom and edge of a greased springform pan with them.
For the topping, core, peel and divide the apples into eighths. Line the dough base with it.
For the topping, stir the eggs with the sugar and vanilla sugar until frothy, add the quark and sour cream and finally fold in the flour and baking powder.
Spread the topping over the apples and bake the cake in the preheated oven at 200 ° until the topping has turned a golden yellow color (approx. 30 - 45 minutes).