Margaritas are the perfect summer cocktail. Refreshing, zesty and salty – they're perfect for a barbecue.
1 large egg white, size 7,
2 tablespoons sea salt
1½ cups freshly squeezed
½ cup caster sugar
limes, halved, to serve
Put the egg white in a small bowl and the salt into a shallow saucer. Dip each glass first into the egg then the salt to decorate.
Put the lime juice in a blender with the caster sugar and whizz to dissolve the sugar. Add the tequila and cointreau and stir to combine. Fill glasses with crushed ice and pour over the margarita mixture. Serve with limes for squeezing.