Richard Grausman created his lighter version of the classic French watercress soup in his book, "At Home With The French Classics." The traditional soup is thickened with potatoes; this is thickened with zucchini. I in turn adapted his recipe somewhat. Use the leaves from one bunch of watercress. PLEASE NOTE: this soup is WW friendly, even though it is not titled or categorized as such. To make the soup @ zero points, I use no fat and just boil the leeks (can sub white onion) in the broth. I usually add a little olive oil to the bowl just before serving, so if you do that, remember to count points for the oil or butter you use.