01 - Heat olive oil in a large Dutch oven or heavy-bottomed pot over medium-high heat. Add sliced turkey sausage and cook, stirring occasionally, until nicely browned on all sides, approximately 4 to 5 minutes. Transfer sausage to a plate, leaving rendered fat in the pot.
02 - Reduce heat to medium. Add chopped onion, bell pepper, celery, and jalapeño to the pot. Cook, stirring frequently, until vegetables have softened and onions are translucent, about 5 to 6 minutes.
03 - Stir in minced garlic, Cajun seasoning, smoked paprika, dried thyme, oregano, and cayenne pepper. Cook constantly stirring 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 to the pot. Stir thoroughly to coat rice evenly with the spice mixture and vegetable base, approximately 1 minute.
05 - Pour in chicken broth and increase heat to bring mixture to a rolling boil. Immediately reduce heat to low, cover tightly with lid, and simmer gently for 15 minutes until rice has absorbed most of the liquid.
06 - Return browned turkey sausage and any accumulated juices to the pot. Stir gently to distribute, cover again, and continue simmering for 10 additional minutes until rice is nearly tender.
07 - Carefully fold in shrimp, distributing evenly throughout. Cover and cook for 5 to 7 minutes until shrimp turn pink and opaque and rice is fully tender. Avoid overcooking to prevent rubbery shrimp.
08 - Remove from heat. Taste and adjust seasoning with additional salt and black pepper as desired. Let stand covered for 5 minutes, allowing flavors to meld and rice to firm slightly.
09 - Fluff rice gently with a fork, being careful not to break up the grains. Transfer to serving bowls and generously top with chopped fresh parsley and sliced green onions. Accompany with lemon wedges for squeezing over individual portions.