Step 3
As soon as the roux has reached the desired color, stir in the onions, bell peppers, celery, Cajun seasoning, and bay leaves, and simmer, stirring occasionally, until the vegetables are tender, about 45 minutes. Pour in the reserved chicken broth, diced tomatoes, and beef sausage, and simmer, stirring occasionally, until the mixture has thickened, about 1 hour.