Spray 10-inch skillet with cooking spray; heat over medium heat. Cook chicken in skillet about 5 minutes, stirring frequently, until brown.
In 3 1/2- to 4-quart slow 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 noodles. Increase heat setting to High. Cover; cook about 30 minutes or until noodles are tender.