Spice up classic fettuccine alfredo by adding bold Cajun seasonings and andouille sausage. This comforting meal comes together fast enough to enjoy on a busy weeknight, but is impressive enough to serve guests.
Bring a large pot of salted water to a boil. Cook the fettuccine according to package directions.
While the pasta cooks, heat the oil in a large skillet over medium-high heat. Add the sausage and cook, stirring occasionally, until golden brown on both sides, about 3 minutes. Add the scallions, celery, bell pepper, and Cajun seasoning and cook, stirring occasionally, until the vegetables are slightly softened, about 5 minutes. Add the cream and simmer until slightly thickened, about 1 minute.
Once the pasta is cooked, transfer it directly from the boiling water into the cream sauce using tongs or a pasta fork. Sprinkle the pasta with the Parmesan and toss to combine. Add a splash of the starchy pasta water to help the sauce thicken and coat the pasta. Top with chopped parsley and serve with additional Parmesan.