Clean, wash and cut the sugar snap peas into narrow strips. Blanch sugar snap peas and frozen peas in boiling salted water for 1-2 minutes, drain and chill. Coarsely chop salad ve125 g chocolate coating and melt over a warm water bath. Let cool for about 5 minutes. Grease the bottom of a springform pan (26 cm Ø) and dust with flour, wash and drain.
Separate eggs. Beat the egg whites and 5 tablespoons of cold water with the whisk of the hand mixer until stiff. Finally, gradually add 125 g of sugar, vanilla sugar and salt. Add egg yolks one after the other and fold in. Add the liquid chocolate coating while stirring. Mix flour, 60 g starch, cocoa and baking powder, sieve onto the egg foam and fold in carefully with a dough scraper.
Put the sponge mixture into the springform pan and smooth it down. Bake in the preheated oven, 2nd shelf from below (electric oven: 175 °C/ convection oven: 150 °C/ gas: level 2) for approx. 30 minutes. Let the sponge cake cool down in the tin on a cake rack for about 4 hours. Remove the sponge cake from the tin and cut through horizontally twice
Wash, peel and quarter the apples and remove the core. Cut the apple quarters into pieces and put them into a pot with 3 tbsp. lemon juice, 75 g sugar and 100 ml apple juice. Bring to the boil, cover and stew over low heat for about 4 minutes. Stir 25 g starch and 50 ml apple juice until smooth. Stir the starch into the compote and let it simmer for about 1 minute while stirring. Place a cake ring around the lower sponge cake base and spread the hot compote on top. Let cool down for about 1 hour
Soak the gelatine in cold water for about 10 minutes, squeeze it out, dissolve it in a saucepan over low heat and mix with 50 ml of syrup. Stir the gelatine mixture into the remaining syrup and refrigerate for about 30 minutes. Stir in between. Whip 500 g cream until stiff and also refrigerate. When the syrup becomes slightly thick, stir in approx. 2/3 of the cream. Fold in the rest of the cream. Spread about 1/3 elderflower cream on the apple compote and cover with the second base. Spread the remaining cream on top and cover with the third layer. Chill the cake for about 4 hours, preferably overnight.
Crumble the meringue coarsely. Slice 30-40 g of the remaining chocolate coating into fine shavings. Whip 500 g cream and vanillin sugar until stiff. Coat the cake all around with half of the cream. Put the rest of the cream in a piping bag with a large star-shaped spout and decorate the cake with cream tuffs. Sprinkle meringue and chocolate shavings on the edge and centre of the cake. Spread 1 tbsp. lemon juice on apple slices and put them into the tuffs. Keep cool until serving
waiting time approx. 8 hours