Sprinkle lemon juice over pears; drain.
Combine wine and next 4 ingredients (wine through cinnamon) in a large non-aluminum Dutch oven. Add star anise, if desired; bring to a boil. Reduce heat, and cook, covered, 10 minutes. Add pears; simmer 10 minutes or until tender, turning pears occasionally. Remove pears from wine mixture using a slotted spoon. Place in a shallow bowl; set aside.
Bring wine mixture to a boil over high heat; cook 10 minutes or until reduced to about 2 cups. Discard solids. Spoon reduced wine mixture over pears; sprinkle with ginger.