Spray 10-inch nonstick skillet with cooking spray; heat over medium-high heat. Add chicken to skillet; sprinkle with peppered seasoned salt. Cook 6 to 8 minutes, stirring occasionally, until brown.
Mix chicken and remaining ingredients except broccoli, squash and basil in 3 1/2- to 4-quart slow cooker.
Cover and cook on Low heat setting 7 to 8 hours.
Stir in broccoli, squash and basil. Increase heat setting to High. Cover and cook 15 to 20 minutes or until vegetables are tender.