Italian Chicken Stir-Fry

3/4 cup Kraft Zesty Italian Dressing, divided
1 pound boneless skinless chicken breasts, cut into bite-size pieces
1 (16 ounce) bag frozen mixed vegetables, thawed
3 cups hot cooked white rice

Heat 1/4 cup of the dressing in large skillet on medium heat. Add chicken; cook and stir 8 minutes or until chicken is cooked through. Add vegetables and remaining 1/2 cup dressing; cook and stir until vegetables are crisp-tender. Serve over rice.