Break the rusks into pieces, pour the milk over them and let them steep. Separate eggs. Mix egg yolks, vanilla sugar, 50 g sugar, quark, semolina and lemon juice and fold into the rusk pieces.

Beat the egg whites with a pinch of salt and 50 g sugar until stiff, fold in. Put half in a greased dish. Spread half of the blackberries on top. Put the rest of the quark mixture and the rest of the blackberries on top. Bake in a preheated oven (200 ° C, top / bottom heat or convection: 175 ° C) for about 20 minutes. Sprinkle with powdered sugar before serving.

Latte macchiato tastes good with it.