Make lime sugar by combining sugar and lime zest together with your fingertips to release the citrus oils. Pour lime sugar onto a small plate and spread it out as wide as your cocktail glass.

Rim your cocktail glass with a lime wedge (or dip in lime juice) and then dip in the sugar.

Fill a cocktail shaker with ice, add lime juice, tequila, pomegranate juice, triple sec, and simple syrup. Shake until cold and strain into your glass. Garnish with a slice of lime and some redcurrants.