In a small bowl, combine cornstarch and broth; set aside. In a large skillet, cook chops in oil over medium heat for 2-3 minutes on each side or until chops are lightly browned; drain. Remove and keep warm.
In the same skillet, saute apple and onion until apple is crisp-tender. Stir in the broth mixture, apple juice, mustard and thyme; bring to a boil. Add pork chops. Reduce heat; cover and simmer for 4-5 minutes or until a thermometer reads 145°. Let stand 5 minutes before serving.