In a small saucepan combine the pears, wine, water, vanilla bean, star anise, salt and lemon peel. Bring to a boil then let simmer for about 15 minutes until the pears are soft. Transfer the pears to a blender and puree with the sugar. Heat the remaining liquid in the pan on a simmer until slightly reduced, about 10 min. Remove the lemon peel, star anise and vanilla bean and combine the liquid with the pear puree. Transfer to an airtight container, add in two tablespoons of the St. Germain and chill completely. Using an ice cream maker, churn the mixture according to manufacturer's directions then freeze until set. If you don’t have an ice cream maker you can freeze the mixture in an airtight container and stir every 30 min or so until solid. It won't harden completely due to the alcohol in it, but after 12-24 hours it firms up really well.