Bring a large saucepan of generously salted water to a rolling boil over medium-high heat. Cook fettuccine according to package directions, drain, and set aside.

In a medium saucepan, melt butter over medium heat. Add smoked salmon and sauté for two minutes.

Add heavy cream, salt, and pepper. Mix well and bring to a gentle simmer.

Stir in Parmesan and return to a simmer, stirring occasionally until the sauce thickens slightly, about one more minute.

Add pasta to the sauce and mix well to coat. Serve immediately with extra Parmesan and parsley.