Stir in onion. Cook until onion is soft, about 10 minutes; drain off excess fat.
Stir in seasonings; cook, stirring 1 minute. Stir in tomato, pears and vinegar; simmer until most of the liquid has evaporated, about 15 minutes.SERVING SUGGESTIONSUse as a filling for tacos, tostadas or burritos or as an entrée with rice and a vegetable.