Cream fat and 175 g sugar. Stir in the eggs one by one. Mix flour and baking powder. Stir in with milk. Spread on a greased baking tray (approx. 35 x 40 cm). Bake in a hot oven (electric cooker: 200 °C/ convection oven: 175 °C / gas: level 3) for about 20 minutes. Let it cool down. Halve the base and remove from the baking tray
Soak the gelatine in cold water. Heat 100 g jam and spread on the bottom. Mix sour cream and 50 g sugar. Squeeze the gelatine and dissolve over a mild heat. Stir in 5 tbsp sour cream, then stir into the remaining sour cream. Cool until it begins to gel
Whip 250 g whipped cream and vanillin sugar until stiff. Fold into the sour cream and spread on both sides. Chill for about 1 hour
Wash, clean and quarter the strawberries. Quarter melon, remove seeds. Possibly cut out 20 melon balls for decoration. Dice the rest of the pulp. Drain the mandarins, catch the juice
Spread the fruit on the cream. Fill up mandarin juice to 1/2 l with water if necessary. Mix icing powder and 2 tablespoons of sugar. Mix with juice. Boil up while stirring. Spread on the fruits. Chill the cake for about 3 hours. Whip 150 g whipped cream until stiff. Cut cake into pieces, decorate with cream, 2 tbsp. jam, possibly melon balls and mint