TOSS chicken with 1/4 cup dressing and hot sauce; set aside. Heat remaining dressing in large nonstick skillet on medium-high heat. Add vegetables; stir-fry 1 min. Add chicken mixture; stir-fry 4 to 5 min. or until chicken is done.
STIR in pineapple and nuts; cook 5 min. or until heated through, stirring occasionally.
SERVE over rice.