Peel, core and chop the apples. Steam with 50 g sugar and lemon juice for about 15 minutes. Stir apple juice and sauce powder until smooth. Bind the mush with it. Take off 3 tbsp. for decoration
Separate eggs. Beat the egg white and 4 tbsp. water until stiff, adding 160 g sugar. Stir in egg yolk. Mix flour, starch and baking powder and fold in
Grease only the bottom of a spring form (26 cm Ø). Pour in the sponge mixture. Bake in a hot oven (electric cooker: 200 °C / convection oven: 175 °C / gas: level 3) for about 20 minutes. Remove from the rim and let cool off
Whip cream, firming agent and 3 tbsp. sugar until stiff, if necessary in portions. Divide sponge cake 2x. Spread the bottom layer with half of the applesauce and about 5 tbsp. cream. Place 2nd base on top. Repeat the process. Cover with 3rd base. Spread the cake all around with cream. Decorate with cream, puree and hazelnut brittle