Heat oil heavy large Dutch oven over high heat until almost smoking. Add flour and stir until dark red-brown, about 8 minutes. Immediately add celery, onions and bell peppers. Cook 5 minutes, stirring and scraping bottom of pan often. Mix in bay leaves, salt, oregano and cayenne. Add clam juice, canned tomatoes and sausage. Boil 15 minutes. Add okra, reduce heat and simmer until okra is tender, about 15 minutes. (Can be made 1 day ahead. Cover and chill. Bring to simmer before continuing.) Add shrimp to gumbo and simmer until just cooked through, about 3 minutes. Mound rice in soup bowls. Ladle gumbo over. Sprinkle with tomatoes. Serves 8. Bon Appetit November 1992