Blueberry-Mango Upside-Down Cake

Place egg whites in a medium bowl. Let stand at room temperature for 30 minutes. In a small bowl, stir together flour, baking powder, orange peel, and ginger; set aside.

Preheat oven to 350 degrees F. Line the bottom of a 9x1 1/2-inch round baking pan with parchment paper, and grease the paper. In a small bowl, stir together brown sugar, the 2 tablespoons melted butter, and the water. Spread in prepared pan. Arrange mango or peach slices over brown sugar mixture. Sprinkle with blueberries.

Beat egg whites with an electric mixer on high speed until soft peaks form (tips curl). Gradually add 1/4 cup of the granulated sugar, beating until stiff peaks form (tips stand straight). Set aside.

In a large bowl, beat the 1/4 cup butter with an electric mixer on medium speed for 30 seconds. Beat in the remaining 1/4 cup granulated sugar and the vanilla. Alternately add the flour mixture and milk, beating on low speed just until combined. Fold egg white mixture into batter; spoon over fruit in baking pan, spreading evenly.

Bake for 35 to 40 minutes or until a toothpick inserted near the center comes out clean. Cool cake in pan on a wire rack for 5 minutes.

Loosen side by running a knife around cake; invert onto serving plate. Carefully peel off parchment paper. Cut into wedges. Serve warm. If desired, serve with frozen yogurt.