Watermelon Sorbet

1. Place sugar and water in a small saucepan. Bring to a boil over medium heat, stirring occasionally. When sugar has dissolved, remove pan from heat, and stir in cr�me de menthe if using. Chill the syrup. 2. Remove seeds from watermelon flesh. Place flesh the bowl of a food processor or blender; process until liquefied, about 2 minutes. Add pur�e to chilled syrup; stir to combine. 3. Freeze sorbet in an ice-cream maker according to the manufacturer's instructions. Store, frozen, in an airtight container.