Chocolate Mousee Hazelnut Cake

Ingredients

• Matzo cake meal (for pan)
• 3 ounces hazelnuts, toasted and ground, 1 cup
• 1/2 cup matzo cake meal
• 2 tablespoons potato starch
• 1/4 teaspoon cinnamon
• 8 egg yolks, room temperature
• 1/2 cup sugar
• 2 teaspoons vanilla, optional
• 4 egg whites, room temperature
• 1/8 teaspoon salt
• 1/3 cup sugar
• 8 ounces semisweet chocolate
• 1/4 cup strong freshly brewed coffee
• 4 eggs, separated, room temperature
• 1 tablespoon Passover brandy or rum
• 2 tablespoons sugar