1
Cook fettuccine according to package directions; drain. Keep warm.
2
In large skillet, melt butter over medium-high heat. Add broccoli and onion; cook, stirring frequently, 3 to 5 minutes or until broccoli is crisply-tender.
3
Stir Alfredo sauce and chicken into skillet. Cook, stirring constantly, 2 to 3 minutes or until heated thoroughly. Toss with hot fettuccine.