Heat olive oil in a large pot or Dutch oven over medium-high heat. Add peppers, celery, onion, and garlic, sauté until tender, about 5 minutes.
Add Cajun seasoning, stir to coat, and continue to cook for 1 min.
Add broth and crushed tomatoes, stir to combine, and bring to a simmer. Once simmering, reduce heat to medium-low, cover, and cook for 30 minutes, stirring occasionally.
Add the shrimp to the pot along with the sausages, stir, cover, and continue to cook for 15 minutes, or until the shrimp are cooked through. Season to taste with salt and pepper. TIP: You can make your own Cajun seasoning by blending garlic powder, onion powder, paprika, cayenne pepper, oregano and thyme.
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