Finely crumble the rusk and amaretti. Line the bottom of a springform pan (26 cm Ø) with baking paper. Spread crumbs on top. Mix cream cheese, quark, eggs, 150 g sugar, salt, lime juice and starch carefully. Pour in half of the cream. Sort 125 g blueberries and sprinkle on top.
Spread the rest of the cream and smooth it down. Bake the cake in a preheated oven (electric cooker: 175 °C/ convection oven: not suitable/ gas: level 2) for 55-60 minutes. Leave to cool in the tin. Remove from the tin and cut into pieces. Sort 100 g blueberries, wash and mix with 2 tablespoons of sugar. Decorate cake pieces with it