Cook sausage in lg dutch oven over med-high heat. Make sure to break the meat up w/ a spoon. Cook for about 5 mins, or until browned. transfer to a bowl.
Add oil to pan, then add onion and cook 2 mins. Add garlic and cajun seasoning, cook, stirring for 30 seconds. Add flour and cook, stirring to coat veggies.
Add tomatoes. Cook, stirring occasionally for about 2 mins. Stir in broth. Cover, increase heat to high and bring to a boil. Return sausage to pot. Add okra and rice. Reduce heat to a simmer. Cook until rice is tender, about 10 min. Sprinkle w/ scallions before serving.