In a large pot, heat the olive oil over medium-high heat. Add the red and green bell peppers, onion, garlic, and celery. Sauté for 6 minutes until the vegetables are soft, stirring often.
Stir in the fire-roasted tomatoes, broth, Cajun seasoning, black pepper, bay leaf, sausage, and cooked rice. Mix well and cook for 4 minutes.
Add the shrimp to the pot, stirring to combine. Cover and simmer on medium-low heat for 10 minutes, or until the shrimp are cooked through and pink. Adjust salt to taste and serve immediately.