Alcohol-free passion fruit martini

Scoop the flesh from four of the passion fruit halves into a cocktail shaker. Add the lemon juice, egg white, spirit and syrup and shake vigorously until frothy.

Add the ice, then shake again until the outside of the shaker feels cold. Double strain into martini glasses (see tip below).

Top up the martinis with the grape juice and garnish with the remaining passion fruit halves.