Frozen Orange Margaritas

If desired, spread salt on a small plate. Rub the rims of 2 glasses with lime wedges, then dip each glass in the salt.

Combine ice, tequila, orange liqueur, orange juice, lime juice and agave, if using, in a blender; puree until smooth.

Divide between the prepared glasses (or 2 other glasses) and garnish each with an orange and/or lime slice, if desired.