Key Lime Ice

Directions

1. 1
   Combine sugar, lime zest and lime juice in a heatproof bowl; Add boiling water and stir until dissolved.
2. 2
   Cover and refrigerate until chilled ,1 hour or overnight.
3. 3
   Add yogurt to the lime mixture and whisk till smooth; pour into ice cream maker and freeze according to manufactures directions( or freeze mixture in a shallow metal pan until frozen; break into chunks and process in a food processor until smooth).
4. 4
   Serve immediately or transfer to a container and let harden in the freezer for 1 to 1 1/2 hours; serve in chilled dishes.