Cool cake layers in pans 10 minutes. Turn onto cooling racks; allow to cool completely. Fill and Frost with the following frosting: For the Frosting 3 large egg whites 1 3/4 cups sugar 1/3 cup coconut water 1/2 tsp cream of tartar 1/4 teaspoon salt Bring 1 quart water to a boil in a 4 quart saucepan over high heat. Decrease heat to medium to maintain a steady simmer. In the meantime, place all ingredients in a medium size, heat-proof mixing bowl. Place the bowl over the simmering water and immediately begin beating with an electric hand mixer on low speed. Beat for 1 minute, then increase speed to high and continue to beat for 5 minutes. Remove from heat and beat in 1 teaspoon coconut extract and 1/2 teaspoon vanilla extract for 1 minute. Allow frosting to sit for 5 minutes before using. For building your cake, you will also need 3 cups freshly grated coconut (one fresh coconut should yield 3 to 4 cups) Stack and fill layers using 1 cup frosting and 1/2 cup coconut per each of first two layers. Cover outside of cake with remaining frosting and as much coconut as you can get to adhere.