01 - Combine grape juice, sugar, cinnamon stick, star anise, and lemon zest in a large saucepan. Bring to gentle simmer over medium heat, stirring until sugar completely dissolves.
02 - Add pear halves to simmering syrup, ensuring they are mostly submerged. Cook gently for 20-25 minutes, turning occasionally, until tender but still holding shape.
03 - Remove pears with slotted spoon and set aside. Increase heat and boil syrup for 5-10 minutes until slightly thickened and concentrated.
04 - Discard spices and lemon zest. Return pears to reduced syrup. Cool to room temperature or refrigerate until chilled. Serve drizzled with syrup, garnished with mint and nuts if desired.