Heat the oil in a soup pot over medium high heat. Add in the red onions, bell pepper, and celery. Saute for 3 to 5 minutes.
Add the sliced sausage. Cook for 3 to 5 minutes until the sausage heats through.
Then, mix in the crushed tomatoes , cajun spices, and bay leaves and stir well. Add the cauliflower rice and cook for 5 minutes to 7 minutes.
At the end, add the shrimp and cook through. Season with salt to preferred taste and garnish with green onions.