How to Make It
On a plate, mix the ground ginger and salt. Moisten the rim of a margarita glass with water and dip the rim in the ginger salt to coat.
Fill a cocktail shaker with ice. Add the tequila, Ginger-Lime Syrup, Cointreau and lime juice and shake well. Strain the drink into the margarita glass, garnish with the lime wedge and serve.