This is a children's favourite in France and has quickly become my children's favourite, here in Canada. I saw Laura Calder's "French Food at Home" show on Food Network Canada (foodtv.ca) where she prepared this quick and delicious recipe. You can substitute or add any vegetable you wish. I have found it is great made with broccoli or cauliflower and I sometimes add a couple of julienned carrots just to switch it up a bit. A fairly healthy soup because it is not loaded with cream, flour, butter or highly processed cheeses.