-Freeze 3.5 cups of 1-inch watermelon cubes for at least 4 hours.
-Add the following to a blender:
The frozen watermelon
6 oz. tequila blanco
4 oz. simple syrup
2 oz. fresh lime juice
3 cups ice
Purée until smooth and very thick (mixture will loosen immediately once poured).
-Divide among glasses and garnish with watermelon wedges.