Break out half of the cauliflower florets even smaller than previously prepared and cook until crisp in a little salted water. The rest of the cauliflower is used for the soup.
Immediately before serving, bring the soup to the boil again, add the parmesan and puree the soup with the hand blender. Divide the small pre-cooked cauliflower florets into deep plates and serve the soup on top.
Tip: Finally, serve the soup sprinkled with a few parmesan shavings.