This mango angel food cake is a light and airy dessert that is perfect for any occasion. The cake is made with a fluffy angel food cake batter, which is then flavored with fresh mango puree and a hint of lime zest. The result is a delicate and flavorful cake that is perfect for summer. To make this cake, start by making the angel food cake batter by beating egg whites and cream of tartar together until stiff peaks form, and then folding in sugar, flour, and mango puree. Mix in the lime zest. Pour the batter into an ungreased angel food cake pan and bake until golden brown. Once the cake is done, let it cool completely before removing it from the pan. Serve with a dusting of powdered sugar or a dollop of whipped cream.