HEAT oil in large skillet on medium-high heat. Add chicken; cook 5 to 7 min. on each side or until cooked through. Remove chicken from skillet; cover to keep warm.
COOK Pasta as directed on package, using the large skillet instead of a saucepan.
DRAIN pasta; return to skillet. Add contents of the Cheese Sauce pouch, the tomatoes with their liquid, peppers, onions and parsley; mix well. Top with the chicken. Cook over medium-high heat 3 to 5 min or until heated through, stirring frequently.