First cut the onion into small cubes. Separate the broccoli florets from the stem and set aside. Also cut the stem and the zucchini into small cubes. Chop the coriander into small pieces.
First fry the onion in a little oil until translucent. Then add the zucchini and fry briefly. Now add the broccoli pieces, garlic, coriander, stock and milk. Then puree everything finely with a hand blender. Add the cream cheese, salt, pepper, lemongrass and the broccoli florets and simmer for another 5 - 10 minutes.
To serve, add a few coriander leaves to the soup.
A baguette or walnut bread is a wonderful accompaniment to this.