Grease the springform pan (26 cm Ø). Knead flour, 75 g sugar, 1 pinch of salt, butter in pieces and 1 egg first with a hand mixer and then briefly with your hands until smooth. Cover and chill for about 30 minutes.
Roll out the dough onto some flour and make it round (about 32 cm Ø). Line the tin with it, pressing down on the edge.
Separate 3 eggs. Beat the egg whites and 1 pinch of salt until stiff. Mix quark, egg yolk, 125 g sugar and vanilla sugar. Stir in semolina. Fold in the beaten egg white. Brush into the mould. In the preheated oven (electric cooker: 175°C/circulating air: 150°C/gas: level 2) on the lowest rail (gas: see
oven manufacturer) Bake for 35-45 minutes. Leave to cool in the mould.
Remove the cake from the mould. Select the berries and wash them if necessary. Spread on the cake. Mix the cake glaze powder and 2 tbsp. sugar in a small pot. Stir in 1/2 l water bit by bit. Bring to the boil briefly while stirring.
Spread half of the glaze slowly from the middle out over the berries, allow to set for about 5 minutes. Heat the rest of the glaze again until it is liquid. Spread on the berries. Chill for about 1 hour.