Makes 1.
Ingredients
1 and 1/4 ounces Cuervo Gold Tequila (or other gold tequila)
3/4 ounce Grand Marnier liqueur
1 ounce Sweet and Sour Mix
several ice cubes  (enough to fill a cup)
​cut limes
Steps

1. If desired, place coarse sea salt or Kosher salt on a small saucer.  Moisten rim of glass with a cut lime.  Twirl the rim in the salt. 
2. Combine all ingredients in a blender and blend until smooth.
3. Pour into the glass and garnish with a lime.