Muddled mint and lime, fresh passionfruit, no sugar at all.
Put the mint leaves and lime wedges in the bottom of a tall glass and muddle gently to release the mint oils and lime juice.
Scoop the pulp and seeds of one passionfruit into the glass and muddle lightly with the mint and lime.
Fill the glass to the brim with crushed ice.
Top up with sparkling water or club soda.
Stir gently from the bottom up so the pulp, lime and mint run through the ice.
Float the remaining passionfruit pulp on top and finish with a mint sprig.