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1
Preheat oven to 400u00b0. Bake breadcrumbs in a single layer on a baking sheet 5 to 7 minutes or until golden, stirring once after 2 1/2 minutes.
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2
Cook prosciutto, in batches, in a lightly greased large skillet over medium heat 3 to 4 minutes on each side or until crisp. Drain on paper towels; crumble.
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3
Prepare pasta according to package directions.
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4
Meanwhile, melt butter in a Dutch oven over medium heat; add shallot, and saute 3 minutes or until tender. Add wine, stirring to loosen particles from bottom of Dutch oven, and cook 1 minute.
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5
Gradually whisk in flour until smooth; cook, whisking constantly, 2 minutes. Gradually whisk in milk and next 4 ingredients; cook, whisking constantly, 12 to 14 minutes or until mixture thickens and begins to bubble. Remove and discard bay leaf.
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6
Place 4 cups (16 oz.) Cheddar cheese in a large heatproof bowl. Reserve remaining Cheddar cheese for another use. Add Gouda and Parmesan cheeses to bowl.
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7
Gradually pour white sauce over cheeses, whisking until cheeses are melted and sauce is smooth.
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8
Stir in pasta and prosciutto until blended. Pour into a lightly greased 13- x 9-inch baking dish; sprinkle with breadcrumbs.
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9
Bake at 400u00b0 for 15 minutes or until bubbly. Serve immediately.