Place the water, 200ml vinegar and bay leaves into a pot and boil for 10 minutes.
Place the mushrooms into the pot and allow to blanche for 3 minutes. after reaching boiling point again.
Pour into a collander, drain and allow to cool.
Place all the remaining incredients into a bowl, mix and add the mushrooms.
Place into an airtight container and allow to marinate in the fridge for at least one day.