Cook and drain broccoli as directed on package, using minimum cook time. In large bowl, mix chicken, 2 cups of the cheese blend, the pepper, both soups, sour cream, mushrooms and broccoli.
Spray 5-quart slow cooker with cooking spray.
Spread one-fourth of the chicken mixture in slow cooker.
Layer with 3 of the uncooked noodles (breaking noodles as needed to fit), one-fourth of the chicken mixture and 1/2 cup of the cheese blend. Repeat layers twice.
Sprinkle with Parmesan cheese.
Cover; cook on Low heat setting 3 hours 30 minutes or until bubbly and noodles are tender.
Let stand 10 minutes before serving.
Sprinkle with additional freshly ground pepper, if desired.
