Separate eggs. Beat the egg whites and 1 tablespoon cold water until stiff. Add 75 g sugar and vanillin sugar to the mixture. Stir in egg yolk. Mix flour, cornstarch and baking powder, sieve onto the egg foam and fold in loosely. Line the bottom of a springform pan (26 cm Ø) with baking paper.
Fill in the dough and smooth it down. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: not suitable/ gas: level 2) for approx. 25 minutes. Let it cool down. Clean, wash and cut the rhubarb into pieces. Boil 200 ml water, rhubarb and 75 g sugar. Let simmer for 2-3 minutes. In the meantime stir sauce powder and 3 tablespoons of water until smooth, stir into the boiling rhubarb and bring to the boil again. Set aside and let cool down a little. In the meantime, cover the sponge cake with a cake ring. Soak the gelatine. Mix mascarpone, yoghurt and 60 g sugar.
Let simmer for 2-3 minutes. In the meantime stir sauce powder and 3 tablespoons of water until smooth, stir into the boiling rhubarb and bring to the boil again. Set aside and let cool down a little. In the meantime, cover the sponge cake with a cake ring. Soak the gelatine. Mix mascarpone, yoghurt and 60 g sugar. Squeeze the gelatine, dissolve it and gradually stir it into the mascarpone mixture. Pour the mixture onto the sponge cake. Spoon the compote onto it with a tablespoon and draw streaks with a fork. Chill the cake for at least 1 hour. Remove the cake ring from the cake and decorate all around with amarettinis
Squeeze the gelatine, dissolve it and gradually stir it into the mascarpone mixture. Pour the mixture onto the sponge cake. Spoon the compote onto it with a tablespoon and draw streaks with a fork. Chill the cake for at least 1 hour. Remove the cake ring from the cake and decorate all around with amarettinis