01 - Preheat your oven to 400°F. Lightly grease a small baking dish suitable for two servings.
02 - Bring a large pot of salted water to a rolling boil. Add the elbow macaroni or cavatappi and cook until just al dente according to package directions. Drain thoroughly and set aside.
03 - In a medium saucepan, melt 2 tablespoons of unsalted butter over medium heat. Whisk in the all-purpose flour and cook for 1 minute, stirring constantly, to create a smooth roux.
04 - Gradually whisk in the whole milk and heavy cream until fully incorporated. Bring the mixture to a gentle simmer, whisking continuously, until the sauce thickens and becomes smooth, which should take approximately 3 to 4 minutes.
05 - Remove the saucepan from the heat. Stir in the grated sharp cheddar cheese, Gruyère cheese, 1/4 cup of grated Parmesan cheese, Dijon mustard, smoked paprika, salt, and freshly ground black pepper. Continue stirring until all the cheeses are completely melted and the sauce is smooth and creamy.
06 - Gently fold the cooked pasta and the roughly chopped lobster meat into the prepared cheese sauce until all components are evenly coated.
07 - Pour the luscious macaroni and cheese mixture into the greased baking dish, spreading it evenly.
08 - In a small bowl, combine the panko breadcrumbs, 1 tablespoon of melted unsalted butter, finely chopped fresh parsley, and 2 tablespoons of grated Parmesan cheese. Mix these ingredients thoroughly until well combined.
09 - Evenly sprinkle the panko breadcrumb mixture over the top of the mac and cheese in the baking dish. Bake in the preheated oven for 15 to 18 minutes, or until the topping is golden brown and the cheese sauce is bubbling around the edges.
10 - Remove from the oven and allow the baked mac and cheese to rest for 5 minutes before serving. This allows the sauce to set slightly and prevents it from being too runny.