Subscribe to our magazine
Save 42% & receive a £10 M&S e-gift card!
If you're choosing to salt the rim of your glass like a classic margarita, dip the rim in a saucer of lime juice, followed by a saucer of sea salt.
Put all the ingredients except the soda water into a cocktail shaker, fill with ice and give it a good shake.
Strain into a tall collins glass over fresh ice and top with soda water and a slice of grapefruit to garnish.