01 - Preheat oven to 400°F (200°C). Grease a 2-quart baking dish.
02 - Cook elbow macaroni in salted boiling water until al dente, approximately 1 minute less than package directions. Drain and reserve.
03 - Melt 2 tablespoons of butter in a large saucepan over medium heat. Add flour and whisk for 1-2 minutes until lightly golden.
04 - Gradually whisk in the warmed milk. Continue cooking and stirring until the sauce thickens, about 5 minutes.
05 - Remove the saucepan from heat. Stir in Gruyère, cheddar, and Parmesan cheeses until melted and the sauce is smooth. Add Dijon mustard, cayenne pepper, salt, and black pepper.
06 - Gently fold the cooked macaroni and chopped lobster meat into the cheese sauce, ensuring even coating.
07 - Pour the macaroni and lobster mixture into the prepared baking dish.
08 - In a small bowl, combine panko breadcrumbs with melted butter and chopped chives. Sprinkle this mixture evenly over the top of the mac and cheese.
09 - Bake for 20-25 minutes, or until the topping is golden brown and the mac and cheese is bubbling.
10 - Allow the dish to cool for 5 minutes. Just before serving, artfully spoon small mounds of caviar onto each portion for a burst of flavor.