Garbure should be thick and rib-sticking, and the beans should be cooked until breaking up. It's important, however, not to overcook the cabbage. You'll need to begin this recipe a day ahead.
Note Confit duck legs are available from select delicatessens; or see our confit duck Masterclass to make your own. For a bouquet garni, tie parsley stems, bay leaves, a thyme sprig and celery together with kitchen string.