INGREDIENTS
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1 teaspoon grated lemon peel
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1 (18.25-ounce) package lemon cake mix, batter prepared according to package directions
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1 (7-ounce) jar macadamia nuts, coarsely chopped, divided (see Note)
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1 (15 ¾-ounce) can lemon pie filling, divided
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1 cup (½ pint) heavy cream
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2 tablespoons sugar