First, wash the cucumber, cut into fine cubes. Chop the juniper berries, cut the chives into small rolls.
Pour the gin over the cucumber and leave to infuse for 10 minutes.
Then gently squeeze by hand and pour off the remaining liquid.
In a pan, heat a tablespoon of the butter, add juniper berries and cook for about a minute, stirring constantly.
Whisk remaining butter for about 5 minutes, add marinated cucumber, juniper berries and chive rolls at the end and mix well.
Season to taste with salt and pepper. Allow to cool slightly and set in the refrigerator for about an hour.