Coconut Cloud Cake

INGREDIENTS

• 1 cup sifted cake flour
• 1 1/2 cups superfine sugar
• 14 large egg whites (1 3/4 cups), room temperature
• 1 tablespoon warm water
• 1/2 teaspoon salt
• 1 1/2 teaspoons cream of tartar
• 2 teaspoons vanilla extract
• 3 large egg whites
• 1 1/4 cups sugar
• 5 tablespoons cold water
• 1/4 teaspoon cream of tartar
• 1 teaspoon vanilla extract
• 3 to 4 cups flaked coconut