Cut the courgettes and the celery into chuncks and roughly chop up the green beans. Add them all to a pan.

Add the herbs and the water to the pan and bring the water to a boil. Lower the heat and simmer convered for 30 minutes.

Strain the liquid and drink straight away or store in glass jars in the fridge for at least 7 days.

The leftover vegetabels and herbs can be blended with some of the liquid to make into a thick soup.