Separate eggs. Beat the egg whites and 3 tbsp. water until stiff, pour in 90 g sugar. Beat the egg yolks separately. Sift flour and baking powder on top. Fold in almonds. Spread into a springform pan (26 cm Ø) lined with baking paper. Bake in a hot oven (electric cooker: 200 °C/circulating air: 175 °C/gas: level 3) for 15-18 minutes. Let cool down
Mix 3 tablespoons of milk, sauce powder and 1 tablespoon of sugar. Boil up the rest of the milk. Stir in the sauce powder, bring to the boil (the result is a pudding!). Let it cool down, stir more often
Hollow out the sponge cake base in the middle, leaving an approx. 2 cm wide rim all around. Finely crumble half of the remaining dough (use the rest of the dough for other purposes)
Mix the quark and vanillin sugar. Fold into the pudding with the dough crumbs. Fill the sponge cake with it. Chill for about 1 hour.
Wash and clean the berries if necessary. Halve or quarter strawberries. Spread the fruit dome-shaped on the quark filling. Mix icing powder and 3 tsp. sugar. Mix with 1/4 l water and bring to the boil. Spread on the berries. Chill for at least 1 hour. Dust the cake with icing sugar and decorate with berries