Layered Fruit Gateau

Preheat the oven to 180°C.

Prepare and weigh all the ingredients. Spray a springform pan lightly with water and line with baking parchment. Whisk the egg yolks with the water, half of the sugar and the vanilla sugar until thick and foamy. Beat the egg whites until they form soft peaks, then trickle in the remaining sugar and continue beating until they form stiff peaks. Fold the beaten egg whites into the egg yolk mixture with a mixing spoon. Sieve the flour and cornflour over the egg mixture and fold in. Spread the mixture smoothly in the prepared springform pan and bake in the preheated oven (middle shelf) for about 30 minutes. Test with a wooden cocktail stick to see if it is done. When done, take out of the oven, remove from the springform pan, pull off the baking parchment and cool on a cake rack.