Knead butter in pieces, 75 g sugar, flour and 1 egg first with the dough hooks of the hand mixer, then with your hands to a smooth dough. Cover and chill for about 30 minutes. Grease a springform pan (26 cm Ø). Roll out the dough onto a lightly floured work surface (approx. 30 cm Ø). Line the form with this and press the dough on the edge. Prick the base several times with a fork.
Sprinkle with breadcrumbs and chill. Drain the apricots on a sieve. Crumble the Amarettini roughly. Mix curd, cream cheese, sour cream and 150 g sugar with the whisk of the hand mixer until smooth. Stir in cheesecake aid and 4 eggs one after the other. Stir in cookie crumbs, except for 2 tablespoons, and liqueur. Add 1/3 of the quark mixture to the dough. Spread apricot halves, except 4, on top. Pour the rest of the quark mixture over the dough. Bake in the preheated oven (electric range: 175 °C/ convection oven: 150 °C/ gas: level 2) on the lower rack for 55-65 minutes. Cover with foil for 5-10 minutes if necessary.
Stir in cookie crumbs, except for 2 tablespoons, and liqueur. Add 1/3 of the quark mixture to the dough. Spread apricot halves, except 4, on top. Pour the rest of the quark mixture over the dough. Bake in the preheated oven (electric range: 175 °C/ convection oven: 150 °C/ gas: level 2) on the lower rack for 55-65 minutes. Cover with foil for 5-10 minutes if necessary. Let the cake cool down for about 15 minutes with the oven door open. Carefully remove the cake from the edge of the springform pan with a knife. Let the cake cool down in the mould for at least 4 hours. Cut the remaining apricot halves into slices. Decorate the cheesecake with the apricot slices, remaining cookie crumbs and decorate with sugar crystals
Let the cake cool down for about 15 minutes with the oven door open. Carefully remove the cake from the edge of the springform pan with a knife. Let the cake cool down in the mould for at least 4 hours. Cut the remaining apricot halves into slices. Decorate the cheesecake with the apricot slices, remaining cookie crumbs and decorate with sugar crystals
4 1/2 hours waiting time