Turn mac and cheese into a full meal by adding a protein like shrimp. Four different types of cheese (Gruyère, Cheddar, Swiss, and Parmigiano-Reggiano) make this macaroni and cheese super cheesy. Recipe courtesy of SeaCuisine.
Preheat the oven to 350 degrees F. Coat a 3-quart baking dish with cooking spray.
Cook the shrimp as directed on the package. Remove the shrimp tails and discard.
Meanwhile, melt 6 tablespoons of the butter in a large saucepan over medium heat. Whisk in the flour until blended. Gradually whisk in the milk; bring to a simmer and cook for 3 minutes. Stir in the Gruyère until melted. Stir in the Cheddar, Swiss, salt, and pepper until blended.
Remove from the heat. Stir in the shrimp, shrimp cooking liquids, and macaroni until combined. Spoon into the prepared baking dish. Top with the Parmigiano-Reggiano and breadcrumbs. Drizzle with the remaining 3 tablespoons melted butter.
Cover with foil and bake until heated through, 45 minutes. Uncover, sprinkle on the parsley and bake until golden, 15 minutes.