Creole Macaroni and Cheese

Cook macaroni in a large pot of boiling salted water until al dente. Drain well and set aside. (10 minutes)

In a small skillet, cook the diced andouille sausage over medium heat until browned and cooked through. Remove from skillet and set aside. In the same skillet, melt 1 tablespoon of butter over medium heat. Add bread crumbs and stir to coat evenly. Cook until golden brown and toasted, about 3-5 minutes. Remove from heat, let cool slightly, then mix in the grated Parmesan cheese. Set aside. (10 minutes)

In a medium saucepan, melt 1 tablespoon of butter over medium heat. Add the chopped onion and celery and sauté until softened and translucent, about 5-7 minutes. Transfer the sautéed vegetables to a bowl and set aside. (10 minutes)

In the same saucepan, melt 1 tablespoon of butter over medium heat. Whisk in the flour to create a white roux. Cook for 1-2 minutes, stirring constantly, being careful not to let it brown. Mix in the paprika and prepared mustard. Gradually stir in the milk, whisking continuously to prevent lumps. Bring the mixture to a simmer over medium heat, then add the grated Gruyere cheese and shredded Cheddar cheese. Reduce heat to low and simmer, stirring frequently, until the cheeses are melted and the sauce is thick enough to coat the back of a spoon, about 8-10 minutes. Season with salt and pepper to taste. (15 minutes)

Preheat the oven to 350 degrees F (175 degrees C). Lightly butter a 9x13 inch baking pan or a similar-sized casserole dish. Transfer the cooked macaroni to the prepared dish. Add the cooked andouille sausage and sautéed vegetables to the macaroni and toss gently to combine. Pour the cheese sauce over the macaroni mixture and stir gently to coat evenly. Sprinkle the breadcrumb and Parmesan cheese mixture evenly over the top of the macaroni and cheese. (10 minutes)

Bake in the preheated oven for 20-25 minutes, or until the topping is golden brown and the macaroni and cheese is bubbly and heated through. Let stand for a few minutes before serving. (25 minutes)