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Heat oven to 350 degrees.
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Spray square pan, 9 × 9 × 2 inches, with nonstick cooking spray.
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Mix flour, powdered sugar, margarine and 1 of the egg whites.
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Press in pan.
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Bake about 15 minutes or until set.
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Increase oven temperature to 400 degrees.
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Beat remaining 2 egg whites in small bowl with electric mixer on high speed until foamy.
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Beat in granulated sugar, 1 tablespoon at a time; continue beating until whites are stiff and glossy.
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Do not underbeat.
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Spread jam over baked layer.
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Sprinkle with chocolate chips.
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Spread beaten egg whites over jam and chocolate chips.
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Bake about 10 minutes or until meringue is brown.
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Cool completely.
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Cut into 1 1/2-inch squares.