Directions :

1. In a medium saucepan over medium heat, combine sugar and water until the sugar dissolves.
2. Add the lemon zest; stir until mixture comes to a boil; reduce heat to low and simmer 5 minutes.
3. Place a fine strainer over a large bowl and pour syrup mixture through (straining out any zest).
4. Add lemon juice and vodka to the strained syrup mixture; stir until thoroughly blended.
5. Cover and refreeze until ready to serve.

• Transfer mixture to ice cream maker, process according to manufacturer's instructions.

• Pour into a container, cover and place mixture in the freezer. When it is semi-solid, mash it up with a fork and refreeze again. When frozen place in a food processor or blender and process until smooth.