Mix the Cajun seasoning, garlic powder, onion powder, paprika, black pepper, thyme, cayenne pepper, and oregano together in a small bowl and set aside.
Rub the turkey with the olive oil and season with the Cajun seasoning mixture.
Place the turkey in a roasting pan and roast in the preheated oven for 45 minutes or until the internal temperature reaches 165°F.
Meanwhile, melt the butter in a large skillet over medium-high heat.
Add the chicken broth, celery, onion, parsley, sage, and rosemary to the skillet and cook for 5 minutes, stirring occasionally.
Stir in the bread crumbs, season with salt and pepper, and cook for an additional 3 minutes.
Remove the stuffing from the heat and let cool.
Remove the turkey from the oven and let rest for 10 minutes.
Stuff the turkey with the stuffing and serve.
Interesting Facts
Cajun seasoning is a blend of spices that is typically used in Cajun and Creole cuisine.
Stuffing can also be cooked outside the turkey, in a separate baking dish.
For a vegetarian version, substitute vegetable broth and omit the turkey.