Clean and wash the gooseberries and let them drain well in a sieve. For the base, put flour, baking powder, quark, oil, milk, salt, 75 g sugar, vanillin sugar and 1 egg in a mixing bowl.
Knead with the dough hooks of the hand mixer to a smooth dough. For the icing, mix sour cream, 4 eggs, 100 g sugar and pudding powder with the whisks of the hand mixer. Put the quark and oil dough on a greased fat pan of the oven (32 x 39 cm) and roll out.
Sprinkle with breadcrumbs. Put gooseberries on top. Spread the glaze evenly over the top and bake in the preheated oven (electric range: 200 °C/ convection oven: 175 °C/ gas: level 3) for 35-40 minutes. Remove from the oven, place on a rack and allow to cool. Dust with icing sugar.