Royal chocolate recipe or trianon (video & tips)

Ingredients

• 3/4 cup hazelnut powder
• 2/3 cup icing sugar
• 2 egg whites
• 2 Tbsp sugar
• 1/3 cup sugar
• 1 tablespoon water
• 1 cup whole shelled hazelnuts
• 2.8 oz Gavotte
• 1 1/2 oz milk chocolate
• 2 + 1/2 cup liquid cream (minimum 30% fat)
• 10 1/2 oz dark dessert chocolate
• 6 gelatin sheets
• 3/4 cup sugar
• 1/2 cup water
• 1/3 cup liquid cream
• 2/3 cup cocoa powder
• 1.7 oz dark chocolate
• Gavotte
• Crushed hazelnuts