Infuse in a short glass the gin with the Rose infusion for 3 or 4 minutes.
In the meantime, cool a glass of ice with a bucketful of ice.
Pour the infused gin over the glass and add the piece of star anise.
Add the tonic gently
Finish the combo with 2 rose petals
Construction: on ball-cup
Decoration: Star anise and petals of white and pink rose