PLACE potatoes in microwaveable dish; cover. Microwave on HIGH 15 min. or until tender.
MEANWHILE, heat oil in large nonstick skillet on medium-high heat. Add chicken and onions; cook 10 min. or until chicken is done (170°F), turning chicken and stirring onions after 5 min.
ADD potatoes and remaining ingredients; stir. Cover; simmer on medium-low heat 5 min. or until heated through.
serving size = 1/4 recipe (377 g)