Preparation / Directions:
Remove zest, the colored part of the rind, from 1 Key Lime, and cut into small pieces. Place zest and sugar in a blender or food processor, and process until zest is finely chopped. Pour mixture into a 3 qt saucepan. Add water and salt and heat until sugar dissolves. Cool.
Add enough water to Key Lime juice to make 2/3 cup liquid. Stir into cooled sugar mixture. Pour into divided ice cube trays and freeze. Place frozen cubes in container of blender. Cover and process until cubes become a velvety slush.
Scoop into individual goblets or store, covered in the freezer.