Lactose and fructose free mocha hazelnut cake - Intoleran US

Ingredients

• 5 egg whites
• 3/4 cups of sugar (for fructose free: sugar from dried glucose syrup)
• 5 egg yolks
• zest grated from 1/2 lemon
• 3/4 cup flour, sifted
• 2 tbsp cornstarch, sifted
• 3/4 cups hazelnuts, chopped
• 2 drops of lactase
• 10 fl oz milk
• 1 vanilla pod, marrow scraped out
• 2 leaves of gelatin
• 3 egg yolks
• 3 tbsp cornstarch
• 1/3 cup sugar (for fructose free: sugar from dried glucose syrup)
• 1 cup lactose-free butter at room temperature
• 1.75 fl oz very strong coffee, cooled
• 1 cup lactose free butter at room temperature
• 2/3 cups sugar (for fructose free: sugar from dried glucose syrup)