Wash the berries, shake dry and remove from the stalks. Grease a springform pan (26 cm Ø). Melt 275 g fat, cool down. Mix 375 g flour, 225 g sugar and vanillin sugar. Pour in the fat and mix everything into crumbles with the dough hooks of the hand mixer. Add 2 tablespoons of flour, shake in the bowl. Lightly press half of it onto the bottom of the mould
Melt 25 g fat, cool. Separate eggs. Mix egg yolk and 50 g sugar until creamy. Stir in quark, semolina, lemon peel and liquid fat. Beat the egg whites until stiff, while pouring in 2 tbsp. sugar. Fold into the quark mixture. Spread into the mould. Spread half the berries on top. Mix the rest of the crumbles, 2 tablespoons of flour and the rest of the berries. Spread on the berries
Bake in a hot oven (electric cooker: 200 °C/circulating air: 175 °C/gas: level 3) for approx. 1 hour (cover after approx. 45 minutes if necessary). Cool down. Decorate with sugar crystals, mint and currants