Instructions: For crust: In a medium mixer bowl stir together flour, sugar, lemon zest, and baking powder. Cut in margarine until mixture resembles coarse crumbs.

Make a well in the center. In a small bowl combine the beaten egg, milk, and vanilla; add all at once to the well in the flour mixture. Stir just until dough clings together. spread in bottom of an ungreased 13x9x2 baking pan.

For filling: In a small mixer bowl combine the cream cheeses, sugar, egg, vanilla, and lemon juice. Beat on high speed till smooth and creamy.

Spread over dough in pan. Bake at 350 degrees for 30-35 minutes or until top is light gold. Cool completely on a wire rack. Cover and refrigerate 4 to 24 hours.

For topping: Just before serving time mix sour cream and sugar. Halve the strawberries. Spread the sour cream mixture over the entire cake. then arrange strawberries on cake to resemble the stripes on the US Flag and arrange the blueberries to resemble the blue field with white stars (be sure to leave spaces between the blueberries for the stars to show through).

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