Crush 5 basil leaves with a mortar and pestle.
Combine all the ingredients in a shaker with ice.
Shake well with ice, then remove ice and shake again to cause the aquafaba to emulsify.
Serve in a coupe and garnish with a fresh basil leaf.
Organise your soirée
Put the quantity of ingredients you have, to know how much other ingredients you need and how many cocktails you can make.