INGREDIENTS
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2 cups elbow macaroni
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4 tablespoons unsalted butter
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1/4 cup all-purpose flour
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3 cups milk
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Salt and freshly ground pepper
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2/3 cup freshly grated Parmigiano-Reggiano cheese
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2 cups mixed shredded semihard cheeses, such as Mimolette, aged Gouda and Vella dry jack (1/2 pound)