1 1/2 cups fresh lime juice, plus lime slices or wheels, for garnish
1/2 cup prickly pear puree
Kosher salt, for rimming glasses
Add the tequila, triple sec, lime juice and prickly pear puree to a pitcher and mix well. Chill for at least 4 hours.
When ready to serve, spread some salt on a small plate. Run a lime slice around the rim of each glass. Dip the glass rims in the salt to coat. Fill the glasses with ice and pour the margarita mix over. Garnish with a lime slice.