01 - Combine water, sugar, orange zest, orange juice, cinnamon stick, cloves, star anise, vanilla bean, and ginger in a large saucepan. Stir to dissolve sugar and bring to a gentle simmer over medium heat.
02 - Add peeled pears to the simmering liquid, ensuring they are mostly submerged. Add additional water if needed to cover. Cover with parchment paper round or lid slightly ajar. Simmer gently for 25-35 minutes, turning pears occasionally, until tender when pierced with a knife but not mushy.
03 - Carefully lift pears from liquid using a slotted spoon. Transfer to a serving dish or plate and set aside while reducing the syrup.
04 - Increase heat to medium-high and boil the poaching liquid until reduced by half, approximately 10 minutes. The syrup should coat the back of a spoon. Stir in orange liqueur if using.
05 - Pour the reduced syrup through a fine strainer to remove spices and solids. Serve pears warm or at room temperature, drizzled generously with the spiced orange syrup.