In France, this soup is known as Potage à la du Barry. It is named after a mistress of Louis XV of France, Comtesse du Barry, whose name is given to a number of dishes that contain cauliflower.
Place the cauliflower in a large pan, pour on 100ml (3 ¼fl oz) water. If the cauliflower is not completely covered by the water, add some milk to cover. Bring to the boil, turn the h