Mix the eggs, water and sugar well until the mixture is light, then add the flour.
Line a springform pan with baking paper and do not grease the edge (the dough will rise evenly). Pour in the dough and bake at 180 ° for 30-35 minutes.
I always bake the biscuit the day in advance and cut it through once before filling. Place the base on a plate and fold over with the cake ring.
Cheese cream:
Mix the quark, sugar, egg yolks and vanilla sugar together well. Beat the cream and egg whites until they are extra stiff. Add the dissolved gelatine to the quark mixture. Then stir in the cream and fold in the egg white. Finally fold in the tangerines.
Now pour the quark mixture onto the sponge cake, put the lid on it and put it in the fridge for 1 day.