Puffy Apple Omelet

Combine flour, baking powder and salt; mix well. Add egg yolks, milk; mix well and set aside. In a small mixing bowl, beat egg whites 'til foamy. Gradually add sugar, beating until stiff peaks form. Fold in yolk mixture, lemon juice. Pour into greased 1-1/2 qt. shallow baking dish. Arrange apple slices on top. Combine sugar, cinnamon; sprinkle over all. Bake, uncovered, at 375 degrees for 18-20 minutes or until a knife inserted near the center comes out clean. Serve immediately. Yield: 2 servings.