Line a springform pan (26 cm Ø) at the bottom with baking paper. Separate the eggs. Beat the egg whites, 4 tbsp. cold water and salt until stiff, adding 150 g sugar and vanillin sugar. Fold in the egg yolks one at a time. Sift flour, starch and baking powder on top and fold in. Brush into the mould. Bake in the preheated oven (electric cooker: 200 °C / convection oven: 175 °C / gas: level 3) for approx. 30 minutes. Cooling down
Cut the biscuit twice. Warm the jelly and spread on the first base. Place 2nd base on top. Wrap around the edge of the cake tin or a cake ring
Soak the gelatine in cold water. Drain mandarins, catching the juice. Fill lemon juice with tangerine juice to 1/8 l. Warm up with 60 g sugar. Squeeze the gelatine, dissolve in it and cool. Cool until the juice begins to gel. Whip 375 g cream until stiff. Fold cream first, then mandarins into the juice. Spread on the 2nd sponge cake. Place the 3rd sponge cake on top. Chill the cake for about 4 hours
Roast almonds without fat. Chop the chocolate coating, melt in a hot water bath and spread on oiled aluminium foil, except for 2-3 tablespoons. Allow to dry
Whip 325 g cream until stiff, pouring in 2 teaspoons of sugar. Spread the cake with 2/3 cream, sprinkle with almonds. Heat the rest of the chocolate coating again and put it into a freezer bag. Cut off a small corner. Decorate the cake with chocolate stripes. Cut out small stars from the chocolate plate. Decorate the cake with the rest of cream, carambola and stars