Cook the fettuccine pasta according to package instructions until al dente, then drain and set aside.
In a large skillet, melt butter over medium heat. Add minced garlic and sauté for 1-2 minutes until fragrant.
Add the salmon fillet to the skillet and cook for 4-5 minutes on each side until cooked through. Remove salmon and flake into bite-sized pieces.
Pour heavy cream into the skillet and bring to a simmer. Stir in Parmesan cheese, lemon juice, red pepper flakes, salt, and black pepper. Cook until sauce thickens, about 5 minutes.
Add cooked pasta and flaked salmon to the sauce. Toss gently to combine and heat through for 2 minutes.
Serve immediately garnished with extra Parmesan cheese if desired.
Notes
This creamy salmon pasta is perfect for a quick weeknight dinner or a cozy meal to impress guests.