Beat the eggs, icing sugar and vanillin sugar with the whisk of the hand mixer until thick and creamy. Add oil and 250 g cream slowly while stirring. Mix flour, starch and baking powder, sieve over it, add and mix to a smooth dough. Pour into the greased fat pan of the oven (39 x 32 cm) and smooth down. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for approx. 30 minutes.
Wash and clean the fruits. Halve or quarter strawberries depending on size. Sprinkle sugar over the fruits and mix carefully. Remove the cake from the oven and let it cool down. For the cream, chop the couverture and melt over a warm water bath. Whip 200 g cream until stiff. Add crème fraîche to the chocolate coating and stir in quickly with the whisk of the hand mixer. Fold in the cream. Spread the cream on the dough and smooth it down.
Whip 200 g cream until stiff. Add crème fraîche to the chocolate coating and stir in quickly with the whisk of the hand mixer. Fold in the cream. Spread the cream on the dough and smooth it down. Spread the fruit on the cream and if possible put it in a cool place for 1 hour (alternatively put it in a cool place for 2-3 hours). Cut cake into pieces and arrange on a plate
1 1/2 hours waiting time