1 cup water
1 cup sugar
3/4 cup lemon juice
5 tablespoons lemon zest
In a medium saucepan, Heat the water and sugar until dissolved. Bring to a boil, simmer 2 minutes and leave to cool. Add the lemon juice and lemon zest to the sugar syrup. Chill the mixture.
Freeze the mixture in an ice cream machine, according to the manufacturer's instructions.