Spray 3- to 4-quart slow cooker with cooking spray. Place chicken in cooker. In medium bowl, mix peanut sauce, carrots and onions; pour over chicken.
Cover; cook on Low heat setting 5 to 6 hours.
Cook rice in water as directed on package; spoon onto serving platter. With slotted spoon, remove chicken from cooker; place over rice. Pour sauce from cooker over chicken. Sprinkle with peanuts, cilantro and red bell pepper.