Run a squeezed lime half around the edge of the glass and roll edge of glass through salt to lightly coat glass edge
Add tequila, Cointreau, lime juice and passionfruit pulp and a pinch of salt to a shaker
Fill with ice and shake hard for 15 seconds
Strain into a rocks glass over fresh ice and garnish with passionfruit or lime
If you prefer it a little sweeter, add 10-15ml agave or sugar syrup