Start by boiling the elbow macaroni in salted water until al dente. I usually undercook it slightly because it will continue to bake in the oven. Drain and set aside.
In a medium saucepan, melt butter over medium heat. Whisk in flour until smooth, then gradually add milk. Stir constantly until thickened.
Mix in mustard powder, smoked paprika, salt, and pepper. Slowly fold in cheddar and Gruyère cheese until the sauce is silky and creamy.
Add the cooked pasta and chopped lobster meat into the sauce. Stir gently to coat everything evenly without breaking the lobster chunks.
Pour the mixture into a greased baking dish. Sprinkle panko breadcrumbs and extra cheese on top for a golden crust.
Bake at 375°F (190°C) for 20 minutes, until bubbly and golden on top. Garnish with chopped parsley before serving.