Margaritas, Anyone?

I've just returned from the Canadian Rockies, where the daytime temperature was around 60 degrees. As you can imagine, I'm having trouble adjusting to the heat wave you all have been suffering through. So, I've decided to post the Metropolitan Pavilion's prickly pear margarita recipe... because desert temperatures call for new ways to consume cactus.

9 ounces white tequila
4 ounces orange-flavored liqueur (recommended: Cointreau)
4 ounces cactus pear juice, plus more for the rim
2 ounces fresh lime juice
1 1/2 cups crushed ice
Coarse salt, optional
Lime wedges, for garnish

Place tequila, orange liqueur, cactus pear juice, lime juice, and ice in a blender and blend until smooth. Carefully pour a few ounces of cactus pear juice onto a plate and a few ounces of salt onto another plate. Dip the rim of each margarita glass into the juice and then into the salt. Pour margaritas into each glass and garnish with a lime wedge.