Mix the water with white wine, white wine vinegar, sugar, and salt.
Slice the ginger and lemongrass thinly.
Add them to a saucepan along with the kaffir lime leaves and bring to a boil.
Add them to a saucepan along with the kaffir lime leaves and bring to a boil.
Then strain the sweet-and-sour marinade through a fine sieve and store it in the refrigerator.
Thinly slice the fennel and celery using a mandoline and place it into the chilled marinade.
Let it marinate in the fridge for 1 hour.