Spray inside of 4-quart slow cooker with cooking spray. Place chicken, frozen vegetables, undrained tomatoes, chili pepper, cumin and broth in slow cooker.
Cover; cook on LOW 6 to 8 hours or until chicken is tender. Remove chicken from slow cooker; pull into shreds with 2 forks. Return chicken to slow cooker. Stir in lime juice. Serve and top with tortilla strips, avocado and cilantro, if desired.