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1 (16-ounce) package macaroni |
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5 tablespoons unsalted butter, plus more to butter baking dish |
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6 tablespoons all-purpose flour |
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1 tablespoon Dijon mustard |
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1 1/2 cups grated fontina |
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1/2 cup crumbled blue cheese |
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3/4 cup grated white Cheddar (Australian) |
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3 tablespoons chopped Italian parsley |
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