01 - In a large saucepan, combine the grape juice, sugar, cinnamon stick, star anise, and lemon zest. Bring to a gentle simmer over medium heat, stirring until the sugar dissolves completely.
02 - Add the pear halves to the simmering syrup, ensuring they are mostly submerged in the liquid.
03 - Simmer gently for 20 to 25 minutes, turning the pears occasionally, until they are tender but not falling apart.
04 - Remove the pears with a slotted spoon and set aside. Increase the heat under the syrup and boil for 5 to 10 minutes, until slightly thickened.
05 - Discard the spices and lemon zest. Return the pears to the syrup and let cool to room temperature, or chill in the refrigerator until ready to serve.
06 - Serve the pears drizzled with the syrup, garnished with mint and nuts if desired.