Make a roux with the flour and oil (cook both on med/high heat until med/dark brown in color).  Add onion, green onions, bell pepper, celery and parsley.  Cook until tender.  May need to add a little water (a couple of tablespoons) if mixture starts sticking.  Add sausage and cook for about 15-20 minutes.  Add seafood stock and bring to a boil.  Reduce heat to simmer and add bay leaf, shrimp, crab meat, salt, black and red pepper.  Cook for 30 minutes.  Remove bay leaf before serving.  Serve over cooked rice.