HEAT oil in large nonstick skillet on medium-high heat. Add chicken; cook 5 min. or until evenly browned, turning after 3 min.
STIR in peas, gravy and dressing; bring to boil. Meanwhile, prepare stuffing as directed on package.
DROP spoonfuls of stuffing over chicken mixture around edge of skillet; cover. Simmer on medium-low heat 10 min. or until chicken is done (165ºF) and stuffing is heated through.