Green Turtle Soup

Turtle soup, one of the great traditional European dishes derived from a New World product, should be reclaimed from the English and French and restored to its native land. Cajun-Creole cooking thickens the liquid with a roux; flavors it with tomatoes, onions, garlic, and bell peppers; enriches it with butter; garnishes it with lemon, parsley, and hard-cooked eggs; and tops it up with quantities of sherry. “Fit for a king,” says the Picayune, of soup made from fresh snappers and cowa