Heat the vegetable oil in a large pot over medium heat.

Add chopped onions, bell peppers, and celery to the pot and sauté for 5 minutes.

Stir in the minced garlic and sauté for about 1 minute until fragrant.

Add the sliced smoked sausage to the pot and cook for 5-7 minutes until it starts to brown.

Stir in the chicken broth and diced tomatoes, then add the Cajun seasoning and bay leaves.

Bring the mixture to a boil, then reduce the heat and let it simmer for 30 minutes.

Stir in the shrimp and okra (if using) and cook for an additional 5-7 minutes until the shrimp are pink and cooked through.