Remove the skin and centre from the pineapple, roughly chop the flesh and drop it into a jug
Pour in the gin then blitz with a stickblender until the pineapple has broken down
Strain the liquid through a fine meshed sieve, using a small metal spoon to turn the fruit around and keep the juice flowing out. When drained, discard the fruit pulp
Add the seeds and flesh from the passionfruit to the liquid and stir well
Fill a Copa glass with ice and pour in the elderflower liqueur
Strain the fruity gin over the ice and squeeze the lime wedge over the glass, dropping it in at the end. Add a few of the passionfruit seeds to the glass if desired, along with several chunks of fresh pineapple
Slowing pour the tonic water into the glass and serve immediately
One part is any equal measure - think of it as one measure of your jigger. Essentially, one part is your starting point measurement and you will adjust the other ingredients from there.
For example, if you need 1 part, you would pour one full jigger. For 1/4 part measure 1/4 of your jigger and for 1 1/4 parts measure 1 jigger plus a further 1/4.
In this recipe my jigger is 40ml (1 part) , so 1/4 part is 10ml.