Preheat the oven to 180 °C (fan oven).
Preheat the oven to 180 °C (fan oven).
For the sponge cake: Beat the egg whites with the sugar and salt until stiff.
Fold in the egg yolks, sift in the flour and mix gently.
Line a baking tray with baking paper and spread the sponge cake mixture on it (approx. 1 cm thick).
Bake in the preheated oven for about 10 minutes.
For the cream: Whisk the QimiQ Classic until smooth.
Add the red currants, yogurt, sugar and finely grated lemon zest and mix well.