HEAT dressing in large skillet on medium-high heat. Add chicken; cook 3 to 4 min. on each side or until browned on both sides.
STIR in ham; cover. Simmer on medium-low heat 8 to 10 min. or until chicken is done (165ºF). Meanwhile, prepare Dinner as directed on package.
REMOVE chicken from heat. Add peas; cover. Let stand 5 min. Serve chicken mixture with prepared Dinner.