COOK pasta as directed on package.
MEANWHILE, heat dressing in large skillet on medium heat. Add chicken and vegetables; cook 10 to 12 min. or until chicken is cooked through, stirring frequently. Add broth and cream cheese spread; cook 2 min. or until cream cheese is melted, stirring constantly. Add Parmesan cheese; mix well.
DRAIN pasta; return to pot. Add chicken and vegetable mixture; toss lightly. Cook 1 min. or until heated through. (Sauce will thicken upon standing.)