Ingredients

• 1/4 cup fresh lemon juice
• 4 teaspoons sugar
• 1/4 teaspoon freshly grated lemon rind
• 2 jiggers ( 3 ounces) Cuarenta Y Tres (Spanish herbal liqueur)
• 1 jigger (1 1/2 ounces) vodka

Instructions

1. In a bowl, stir together lemon juice, sugar, rind and 1 1/4 cups water until the sugar is dissolved.Pour the mixture into an ice tray and freeze into solid cubes. The lemon mixture may be prepared up to this point 1 day in advance.
2. In a blender, blend frozen lemon mixture, Cuarenta Y Tres, and vodka, scraping down the sides occasionally, until the mixture is smooth but still frozen. Divide the mixture between 2 stemmed glasses.