01 - Combine grape juice, sugar, cinnamon stick, star anise, cloves, vanilla bean or extract, and orange zest strips in a medium saucepan. Bring to a gentle simmer over medium heat, stirring occasionally until sugar completely dissolves.
02 - Carefully lower pear halves into the simmering liquid, ensuring they are mostly submerged. Add a small amount of water if needed to cover. Maintain gentle simmer for 20 to 25 minutes, turning pears every few minutes, until tender when pierced with a knife but still holding their shape.
03 - Transfer cooked pears to a plate using a slotted spoon. Increase heat to medium-high and boil the poaching liquid for 5 to 10 minutes, stirring occasionally, until reduced by about one-third and slightly thickened to a syrup consistency.
04 - Strain the syrup to remove spices and orange zest. Return pears to the warm syrup to coat thoroughly, or arrange on serving plates and drizzle with syrup. Garnish with fresh mint leaves and accompany with whipped cream or vanilla ice cream if desired.