01 - Heat olive oil in a large Dutch oven or heavy pot over medium heat. Add sliced turkey sausage and cook, stirring occasionally, until well-browned on all sides, approximately 4-5 minutes. Transfer sausage to a plate, leaving rendered fat in the pot.
02 - Add onion, green bell pepper, celery, and jalapeño to the pot. Sauté, stirring frequently, until vegetables have softened and onion is translucent, about 5-6 minutes.
03 - Stir in garlic, Cajun seasoning, smoked paprika, dried thyme, dried oregano, and cayenne pepper. Cook constantly for 1 minute until spices become fragrant, being careful not to burn the garlic.
04 - Add canned diced tomatoes with their juices and long-grain white rice. Stir thoroughly to coat rice evenly with the vegetable-spice mixture, ensuring all grains are well-distributed.
05 - Pour in chicken broth and bring mixture to a rolling boil. Immediately reduce heat to low, cover tightly with a lid, and simmer for 15 minutes until rice begins to absorb liquid.
06 - Return browned turkey sausage and any accumulated juices to the pot. Stir gently to distribute, cover again, and continue simmering for 10 minutes until rice is nearly tender.
07 - Carefully fold in shrimp, distributing evenly throughout. Cover and cook for 5-7 minutes until shrimp turn pink and opaque and rice has reached desired tenderness.
08 - Remove from heat. Taste and adjust seasoning with salt and pepper as needed. Let stand covered for 5 minutes to allow flavors to meld and rice to finish steaming.
09 - Fluff gently with a fork, being careful not to mash the rice. Sprinkle generously with chopped parsley and sliced green onions. Serve hot with lemon wedges on the side for squeezing over individual portions.