Watermelon Margarita

Makes 2 cocktails

2 limes
4 tablespoons tequila
2 tablespoons vodka
1 tablespoon Triple Sec
2 cups watermelon, seeds removed
1/4 cup sugar
3 cups crushed ice

Rub the rims of two glasses with a slice of lime each, and dip the rims in salt.

Process the juice of 1 1/2 limes with the other ingredients in a blender until smooth. Add more crushed ice, and blend until slushy.

Source: Martha Stewart