Trim, clean and chop the leeks and garlic. Peal and finely chop the ginger.
Clean and roughly chop the other vegetables (only peel if not organic).
Puff 10 sprays of oil into the pan and put over medium heat.
Put in the leeks, garlic, mushrooms & celery.
Stir gently, allowing them to sweat & soften for a couple of minutes.
Add the turmeric, bay leaf & carrots, mix together well.
Add the stock and seasoning, stirring well, then increase the heat, put on the lid and bring up pressure.
Pressure cook for 10 minutes, then allow to cool before removing the lid.
Use a hand blender to smooth the soup.