COOK pasta in large saucepan as directed on package, omitting salt and adding vegetables to the boiling water for the last 3 min.
MEANWHILE, cook milk, Neufchatel and 1/4 cup Parmesan in small saucepan on low heat 5 min. or until Neufchatel is completely melted and mixture is well blended, stirring frequently. Stir in chicken; cook 3 min. or until heated through, stirring frequently.
DRAIN pasta mixture; place on large plate. Top with sauce and remaining Parmesan.