In 3 1/2 to 4-quart slow cooker, combine all ingredients except water and flour; mix gently.
Cover; cook on low setting for 6 to 8 hours.
With slotted spoon, remove chicken and vegetables from slow cooker; place in serving bowl. Cover to keep warm.
In small bowl, combine water and flour; blend well. Stir into liquid in slow cooker. Increase heat to high setting; cover and cook an additional 5 to 10 minutes or until thickened. Stir well; spoon mixture over chicken. If desired, serve with hot cooked pasta.