Makes 2 cocktails
1/4 cucumber puree (from peeled cucumber whirred in the food processor or blender)
1/4 cup lime juice
1/4 cup white tequila
1/8 cup Grand Marnier or Cointreau
1/8 cup simple syrup
On a plate, combine the salt and cayenne. Trace the rims of 2 margarita glasses with a lime wedge. Dip each rim in the salt and cayenne mixture.
Combine the rest of the ingredients with ice in a cocktail shaker. Shake vigorously and divide evenly between the two glasses.