01 - Preheat oven to 400°F. Grease a 9x13-inch baking dish with butter or cooking spray.
02 - Bring a large pot of salted water to a boil. Cook pasta until al dente, about 1 minute less than package directions. Drain and set aside.
03 - Melt 4 tbsp butter in a large skillet over medium heat. Add minced garlic and sauté for 1 minute until fragrant. Add chopped lobster meat and cook for 2-3 minutes until just opaque. Remove lobster with a slotted spoon and set aside.
04 - Sprinkle flour into the same skillet and whisk for 1 minute to cook out raw flour taste. Gradually whisk in milk, stirring constantly to prevent lumps. Cook sauce until thickened, about 4-5 minutes.
05 - Reduce heat to low. Add Gruyère, sharp cheddar, and ½ cup Parmesan cheese, stirring until completely melted and smooth. Season with salt, black pepper, and smoked paprika.
06 - Stir cooked pasta and lobster meat into the cheese sauce, mixing gently to distribute evenly. Pour the mixture into the prepared baking dish.
07 - In a small bowl, combine panko breadcrumbs, melted butter, and ¼ cup grated Parmesan. Mix until evenly distributed.
08 - Sprinkle the breadcrumb mixture evenly over the pasta. Bake for 15-18 minutes until topping is golden brown and sauce is bubbling around the edges.
09 - Let the mac and cheese rest for 5 minutes before serving to allow the sauce to set. Garnish with chopped fresh parsley if desired.