In a heavy pot, render fat out of the sausage. Remove sausage, Sauté chicken in the same pot and remove. Sauté the rest of the onions with celery, green peppers, garlic and seasonings (thyme, basil, oregano, white pepper, cayenne pepper) in remaining fat. Dust with flour (sprinkle about 1-1/2 tsp. On top of vegetables to thicken and flavor) and cook for five minutes. Add remaining chicken stock, cook two minutes, and add sausage and chicken, pre-cooked rice, creole tomato sauce, green onions and 2 bay leaves. Simmer for 30 minutes or less or until done, but not too dry. Salt and pepper to taste.