D'ya think that vichisoise would do it? Oh, dear me. sorry. Couldn't resist. Know many French women (all of an older generation) and the only time they made leek soup it had potatoes and cream in it. What are we detox-ing from, anyway. The copious amounts of red wine or heroin? Seriously, if you were making this to cleanse the system, I'd assume it is simply leeks (the entire leek, cleaned well, chopped) covered with water and simmered, then the leeks pressed out and drink the water. If it is supposed to be medicinal, I'd assume there'd be little else. Many Europeans swear by water cures, especially drinking mineral water. Makes sense when you realize that people from most other countries do not drink the copious amounts of water that we do in this country on a day to day basis. Tea, yes. Plain old water, no. Have a friend (yes, I might add, one who is half-French) who bought the book, and will ask her!