Saute the veggies (except tomatoes) in butter/oil for 10 minutes, add seasonings, continue cooking for another 5 minutes. Add broth and tomatoes (including the juice). Cook this down for about 20 minutes on medium heat. While this is cooking, make the roue by combining flour and oil in a metal or iron skillet and heat over medium-high heat for until the desired color is obtained. Traditionally this is a medium brown, but can range from blonde to a darker brown. Stir frequently in the beginning and don't burn it! Stir constantly toward the end as it goes from brown to burnt in no time. The key to many great Cajun recipes is a good roue. If you burn it, start over with these inexpensive ingredients. Stir the roue thoroughly into the veggie mix and then add the shrimp and sausage. Cook on medium for 10-20 minutes. Lower heat to low simmer if you are not ready to serve immediately. Serve with white or brown rice. Publix frozen brown rice cooks in 5 minutes and is perfect.