Put chicken broth, tomatoes with their juice, onion, garlic, celery, parsley, bay leaves, oregano, and thyme in a large pot. Bring to a boil; reduce heat and simmer for 10 minutes. Add shrimp, crabmeat, cooked chicken, Worcestershire, and cayenne.
Continue to simmer for another 10 minutes. Add okra and cook until okra is tender, about 5 minutes. Remove and discard bay leaves.
Ladle into soup bowls. Place 1/3 cup of cooked rice on top of each serving and sprinkle with scallions.
Pass Tabasco separately to sprinkle over the gumbo.
This recipe yields 6 servings.
Exchanges Per Serving: 3 Very Lean Protein, 2 Carbohydrate (1 bread/starch, 3 vegetable).
Nutrition Facts: 255 calories (14% calories from fat), 26 g protein, 4 g total fat (0.9 g saturated fat), 28 g carbohydrate, 4 g dietary fiber, 128 mg cholesterol, 306 mg sodium.