Heat the oil and fry the onions and celery until soft.

Add the garlic and stir fry for 2 minutes.

Add the broccoli stalks, potato, stock and bay leaves and bring to the boil.

Simmer for 10 minutes before adding the remaining broccoli heads.

Cook for a further 5 minutes.

Remove the bay leaves and add most of the rocket and stir for a couple of minutes before whizzing in a blender until smooth.

Season with nutmeg, salt, pepper and lemon. Garnish with a few rocket leaves and serve with croutons or crusty bread.