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; cook 1 min. or until 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.)