Instructions: Heat oven to 350 F. Grease and flour 13 x 9-inch baking pan. For cake, combine first six ingredients. Blend on low speed of electric mixer until moistened; mix at medium speed 2 minutes. Stir in apple. Pour into prepared pan. For topping, combine oats, brown sugar, margarine and cinnamon; mix well. Sprinkle evenly over batter. Bake 40 to 45 minutes or until wooden pick inserted in center comes out clean. Serve with whipped cream, if desired.

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