Heat the olive oil in a stock pot over medium-high heat. Add in andouille sausage and saute for 5 minutes or until the sausage is slightly browned. Remove with a slotted spoon and set aside on a clean plate.
Reduce heat to medium and add the butter to the same pot. Once the butter is melted, add the whites of the green onions, white onion, celery, bell peppers, and jalapeno. Sautee for 5-7 minutes, or until onions are soft. Add in garlic and saute for 1 additional minute.
Add the fire-roasted tomatoes, chicken broth, rice, cajun spice, & salt. Stir to combine. Bring mixture to a boil, stirring frequently so the rice does not settle to the bottom. Cover, reduce heat to medium-low, and simmer for about 15 minutes or until most of the liquid is absorbed and the rice is almost cooked through. Stir frequently, ensuring the rice is not sticking to the bottom.
Add in the gulf shrimp and sausage and stir again. Re-cover and continue simmering until shrimp is cooked through. This should take about 5 minutes. The shrimp will appear curled, pink, and no longer transparent and the internal temperature should be 145 ℉.
Remove from heat. Allow 5 minutes to cool before serving. Serve warm. Garnish with the green parts of the green onion. Enjoy!