Zest the lime and mix with the sugar, then squeeze the lime for the juice.

Rub the lime husk around the rim to wet it and dip in the sugar zest mix.

Fill the glass with ice.

In a shaker go in with your tequila, grapefruit juice, sugar syrup and lime juice then add some ice and shake. Double strain into your rimmed glass then add a slice of grapefruit for garnish. Enjoy!