Cook fettuccine noodles as directed on package.
In a large non stick skillet add the sausage, green pepper and onion. Sprinkle with the blackening seasoning and stir.
Cook in skillet on medium-high heat until browned.
Add the Alfredo sauce and Tabasco (optional).
Reduce heat to medium and simmer until sauce is hot, stirring occasionally.
Pour sausage and vegetables over pasta.
Toss until coated.