Add all the ingredients to cocktail shaker with ice and shake.
Strain into a glass.
Garnish with a slice of fresh lime.
Notes
For the perfect daiquiri the colder the better. If you have time to juice your limes ahead keep the juice in the fridge. You could even do what they do in fancy bars and keep your glasses in the freezer (make sure they are freezer-safe first!) or fill the empty glass with ice to chill it while you shake up your drink. Remove the ice before straining in the cocktail.