Bring the vegetable stock to the boil in a small saucepan and cook the finely crushed cauliflower in it for about 5 minutes. Bring the salted water to the boil in another pot and cut the leek into rings and cook for about 5 minutes, then drain. Melt the cream cheese in the saucepan with the cauliflower, preferably stir in vigorously with the whisk. Season the soup. Add the leek, stir well, done.