Brown sausage in a small amount of oil in a large, heavy-bottomed pot. Remove from pot (leave fat). Make a roux by adding the rest of the oil and the flour. Stir constantly over medium heat for 20 minutes until it’s a rich, dark brown. Add the onion, celery, green pepper and garlic. Cook five minutes. Add the broth, bay leaves, thyme and Cajun seasoning. Stir well. Bring to a boil, reduce heat and simmer 30-45 minutes. Add chicken and simmer 30-45 minutes. Add okra and shrimp, bring back to simmer.
Remove from heat. Stir in half the green onions, parsley and filè.
Serve on rice, topped with remaining green onions, parsley and filè powder.