Melt the fat and let it cool down again a little. Separate eggs. Whisk the egg yolks, sugar, vanillin sugar and lemon zest in a hot water bath to a thick white cream. Remove from the water bath and sieve the flour onto the egg mixture.
Add lukewarm fat slowly and mix everything carefully. Beat the egg white until stiff. Stir 1/3 carefully into the egg cream. Then fold in the rest loosely. Put the sponge mixture on a greased baking tray (35x40 cm) and smooth it down.
Bake in the preheated oven (electric: 175°/ gas: level 2) for about 20 minutes. Leave to cool on the tray. Place apricots in portions briefly in boiling water, rinse with cold water and remove the skin with a knife.
Halve the apricots and remove the stone. Drain the pineapple well on a sieve. Wash the grapes thoroughly and dab dry. Pluck the berries from the stalks and cut them in half once (remove seeds as desired).
Soak gelatine in cold water. Whip the cream until stiff (tip: best not to whip everything at once, but in 2-3 portions). Add sugar and vanillin sugar. Stir in ginger at the end.
Dissolve the gelatine and add to the ginger cream while stirring. Spread the cream loosely on the sponge cake. Heat apricot jam while stirring and pass through a sieve. Mix the fruit and spread on the cream.
Spread the lukewarm jam over it with a spoon or brush. Chill the cake for about 1 hour. Makes about 20 pieces.