1/2 of lime
6 oz of Tequila
3 oz of Triple Sec
1 tbsp of sugar
16 oz of seeded, blended watermelons (or Watermelon)
Cut up a watermelon, removing seeds. Liquify in a blender until you have about 16 oz. Add remaining ingredients, top with ice and blend until smooth. Taste and add sugar if watermelon is not sweet enough. Serve in a margarita glass with a sugar-coated rim.