Spray 10-inch skillet with cooking spray; heat over medium heat until hot. Add chicken; cook about 5 minutes, stirring frequently, until browned.
Spray 3- to 4-quart slow cooker with cooking spray. In cooker, mix chicken and remaining ingredients except peas and noodles.
Cover; cook on Low heat setting 6 hours 30 minutes to 7 hours.
Stir in peas and frozen noodles. Cover; cook on Low heat setting about 10 minutes longer or until noodles are tender.