"Who says you can’t have indulgent comfort food on a weeknight? Be sure to use a broiler-safe skillet, such as a cast-iron one. —Bruce Weinstein and Mark Scarbrough..."
INGREDIENTS
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Kosher salt
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4 ounces grated Gruyère
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12 ounces dried spiral pasta, such as cavatappi, rotini, or double elbows
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1 tablespoon Dijon mustard
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3 tablespoons unsalted butter
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1 tablespoon Worcestershire sauce
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3 tablespoons unbleached all-purpose flour
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1/2 teaspoon dried thyme
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2 cups low-fat (2%) milk
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Freshly ground black pepper
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1 1/4 cups grated Emmentaler
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3 ounces finely grated Parmigiano-Reggiano