Special equipment: 4 old-fashioned glasses
Make the Margaritas: Place all ingredients in a blender and blend on high until smooth, about for 1 to 2 minutes.
Run a lemon slice around the rims of the glasses to dampen them; then dip them in a small plate of salt to coat.
Pour the margarita into the prepared glasses, and garnish with lemon and lime slices.
Recipe courtesy George Stella