Chocolate Hazelnut Cake 

Ingredients:
Crust:
-15 egg whites
-15 tbsp sugar
-12 tbsp flour
-3 tbsp cocoa powder
15 tbsp roasted ground hazelnuts
Filling 1:
-15 egg yolks
-15 tbsp sugar
-1l milk
-10 tbsp flour
-5 tbsp starch
-400g chocolate
-250g margarine/butter
Filling 2:
-500g whipped cream
-450ml sparkling water
-200g white chocolate
-200g ground roasted hazelnuts
-100g melted chocolate