1 pound sweet Italian sausage, casings removed, meat crumbled. 1 large fennel bulb, halved, cored and thinly sliced. 5 1/2 cups chicken stock, preferably homemade. 1 small onion, finely chopped.

Cover and steam for 7 minutes, until the fish is just cooked. Just before the fish is done, reheat the oil in the skillet. Add the remaining scallions and the jalapeños and cook over moderate ...