A bit of a twist on the Marseilles classic. Just a little less fishy. for the soup 3 different fish (800g-1kg each) 1kg whole prawns 1kg mussels (in shell) 1kg clams (in shell) 1 fennel bulb (sliced) 2 onions (quartered) 4 sticks of celery (leaves removed) 3 carrots (peeled, quartered) 1 leek (roughly cut, green...