For the yogurt and cream cake, mix the sugar and egg yolks together in a bowl. Then fold in the egg whites and flour and pour into a small springform pan.
Bake at 200 °C for 10 to 15 minutes. Then let the dough cool down. For the cream, mix the yogurt, sugar and vanilla sugar. Fold in the orange juice.
Dissolve the gelatin according to package directions. First, add a few spoonfuls of cream to the gelatin and stir. Then add the gelatin to the yogurt cream and mix well.
Finally, fold the whipped cream into the mixture. Then pour the cream on the cooled base and put it in the fridge overnight.
The next day, mix fruits (your choice) with a little sugar and garnish the cake with it.