COOK chicken and onions in hot oil in large skillet on medium heat 5 min., turning chicken and stirring onions after 3 min. Add next 3 ingredients; cook and stir 1 min.
STIR in all remaining ingredients except couscous; bring just to boil. Simmer on medium-low heat 25 min. or until chicken is done (170ºF). Meanwhile, cook couscous as directed on package.
SERVE chicken mixture spooned over couscous.
