Crush the blossoms and stalks to release their flavour & aroma
Pop them in a jar
Pour white wine vinegar on top ( make sure flowers and stalks are completely submerged)
Cover, leave for 2 weeks out of direct sunlight.
When 2 weeks has passed sieve the vinegar ( separating the chives from the vinegar)
Pour the now pink vinegar into a clean bottle.
Chive vinegar is self preserving and should last many months if stored in an air tight container out of direct sunlight.