The Green Lantern

-In a blender, puree the following together for 1 minute:

1 cup flat leaf parsley leaves

The zest from 2 limes

½ cup fresh lime juice

1 cup cold water

½ cup sugar

-Strain through a fine-mesh sieve into a large glass-measuring cup. 

-Add ice to 6 glasses and divide mixture between glasses. 

-Add a shot of gin or vodka if you wish, and top with:

Club soda

A lime slice

A small sprig of parsley