Meanwhile, cut meat into 1/2-inch-thick slices, then cut each slice into thin strips. Heat oil in wok or large skillet on medium-high heat. Add meat; stir-fry 3 min. Add carrots and celery; stir-fry 2 to 3 min. or until meat is done and vegetables are crisp-tender. Add dressing and soy sauce; stir-fry 2 min. or until heated through.