1Layer chicken, mushrooms and bell pepper strips in 3 1/2- to 4-quart slow cooker. Drizzle with sherry. Pour pasta sauce evenly over top.
2Cover and cook on low heat setting 5 to 6 hours.
3About 25 minutes before serving, rinse broccoli with warm water to thaw; drain well. Stir broccoli into chicken mixture. Cover and cook on high heat setting 20 minutes. Meanwhile, cook and drain fettuccine as directed on package.
4Just before serving, stir cooked fettuccine into chicken mixture. Sprinkle with cheese.