Cook the potato cubes in half a liter of vegetable broth, then whisk them a little so that the soup gets a little binding.
In the meantime, cut the leek into thin rings and sauté in the butter. Add the curry powder and roast a little. Add to the potatoes and fill up with a liter of vegetable stock. Dissolve the cream cheese in it.
The soup is so delicious that you don`t even need a sausage with it!