Method
Heat the oil in a large pan. Add the flour to the pan and whisk it, till it becomes brown in color. Add the celery, chopped onion, and bell peppers, to the pan, and let it cook for 5 minutes. Then, sprinkle the cayenne pepper, salt, oregano, and bay leaves, over the vegetables. Now, put the sausage, clam juice, and canned tomatoes, into the pan. Allow the mixture to boil for about 15 minutes.