1. Bring a large pot of salted water to a boil. Add fettuccine and cook until al dente according to package directions. Reserve 1/2 cup of the pasta water, then drain and set pasta aside.

2. In a large skillet, melt 2 tablespoons butter over medium heat. Add the lobster and crab meat and gently sauté for 2–3 minutes until warmed. Remove and set aside.

3. In the same skillet, melt the remaining 2 tablespoons of butter. Add minced garlic and cook for 30 seconds until fragrant. Pour in the heavy cream and bring to a gentle simmer. Stir in Cajun seasoning and let it thicken for 3–4 minutes.

4. Lower the heat and stir in grated Parmesan cheese until fully melted and smooth. Return the seafood to the skillet, add cooked pasta, and toss to coat. Add reserved pasta water, a little at a time, until the sauce reaches desired consistency.

5. Finish with fresh parsley and a crack of black pepper. Serve immediately while hot and creamy.