Sprinkle chicken breasts with salt and pepper. In a large nonstick skillet, heat oil over medium-high heat. Add chicken; cook until a thermometer reads 165°, 8-10 minutes. Remove., Meanwhile, stir together next 5 ingredients until blended. Pour into skillet; add pears and dried cherries. Bring to a boil over medium-high heat; reduce heat and simmer, covered, until pears are tender, about 5 minutes. Return chicken to skillet; simmer, uncovered, until heated through, 3-5 minutes. If desired, sprinkle with additional minced rosemary.