2 to 4scoops of lemon,lime or orange sherbet/sorbet (or a swirl)
Use a lime wedge to rim 2 glasses, then dip the rims in the tajin (chili lime seasoning) or salt. Fill the glasses with crushed ice.
Fill a cocktail shaker with ice. Add the tequila, lime juice, simple syrup and grand marnier. Shake for 30 seconds, until the mixture is frothy. Pour the mixture evenly between the 2 glasses. Add in 1 or 2 scoops of sherbet. Serve!