Cut the fat into pieces and knead them together with the flour, egg yolk, sugar, vanillin sugar, salt and about 2 tablespoons of ice water to a shortcrust pastry. Wrap in foil and put in a cool place for about 30 minutes.
In the meantime, drain the cherries on a sieve. For the filling, mix fat, sugar and vanilla sugar until foamy. Add eggs. Stir in pudding powder, lemon juice and zest. Finally add quark.
Roll out the shortcrust pastry and line a greased tart mould sprinkled with breadcrumbs. Spread curd mixture on top and sprinkle with cherries. Bake in the preheated oven (electric: 200°C / gas: level 3) for approx. 45 minutes.
Let it cool down on a cake rack. For the icing, mix the contents of the packet in a saucepan with juice little by little. Bring to the boil while stirring. Pour evenly over the cake from the centre and allow to set.
Results in about 16 pieces.