INGREDIENTS
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4 ounces dried tricolor medium shell macaroni or cavatelli (1-1/3 cups)
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1/4 cup sliced green onion
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2 tablespoons margarine or butter
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1/2 8 ounce container mascarpone cheese or soft-style cream cheese
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1/4 cup milk
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2 tablespoons finely shredded Parmesan cheese
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1/4 cup coarsely chopped walnuts, toasted