1 1/2 teaspoons butter or margarine 1 small apple, peeled, cored & cut into rings 6 teaspoons sugar, divided 1 egg -- separated 1/2 teaspoon grated lemon peel 1/4 teaspoon vanilla extract 1/2 teaspoon all-purpose flour In a skillet over medium heat, melt butter. Add apple rings; sprinkle with 2 teaspoons sugar. Cook until tender, turning once. In a mixing bowl, beat the egg yolk, lemon peel and vanilla for 1 minute. In another mixing bowl, beat egg white until stiff peaks form; fold in flour and remaining sugar. Fold into egg yolk mixture. Place apple rings in a greased 2-cup baking dish. Spread egg mixture on top. Bake at 350 degrees for 15-18 minutes or
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