Fish Soup
1 lb. cod or halibut
1 quart milk
1 sliced onion
1 table-spoon white roux
Cook the fish in boiling salted water until it flakes easily. Drain it. Take away the bones and skin and rub the fish through a sieve. Put the sliced onion in the milk and boil for ten minutes. Remove the onion. Add the white roux (see p. 12) to the milk. Stir till well mixed. Add the fish. Season.