Frozen Margarita

1 1/4 ounces tequila
1 1/4 ounces water
1 1/4 ounces triple sec
3 ounces Mexican lime juice
1/2 teaspoon granulated sugar
3 ice cubes, crushed
Coarse or kosher salt
1 Mexican lime, cut into wedges

Rub the rim of the glass with lime juice, then dip the rim into coarse or kosher salt. Put tequila, water, triple sec, lime juice, sugar and ice cubes into a blender container. Blend until the mixture is slushy. Fill the prepared glass.