COOK pasta as directed on package, omitting salt. Meanwhile, heat large nonstick skillet sprayed with cooking spray on medium-high heat. Add chicken; cook and stir 2 min. Add vegetables; cook 6 to 8 min. or until chicken is done and vegetables are crisp-tender, stirring occasionally.
DRAIN pasta. Add to chicken mixture along with the sauce; cook 5 min. or until heated through, stirring occasionally.
TOP with mozzarella; cover. Remove from heat. Let stand 1 to 2 min. or until cheese is melted; top with Parmesan.