01 - Heat vegetable oil in a large heavy-bottomed pot or Dutch oven over medium-high heat.
02 - Add chicken pieces and sausage. Sauté until chicken is browned and sausage starts to render fat, about 5 minutes. Remove and set aside.
03 - In the same pot, add onion, bell pepper, and celery. Cook, stirring, until softened, about 5 minutes.
04 - Add garlic and cook for 1 minute until fragrant.
05 - Stir in smoked paprika, thyme, oregano, cayenne, salt, and black pepper.
06 - Add diced tomatoes with juice, rice, and bay leaves. Stir to combine thoroughly.
07 - Return chicken and sausage to the pot. Pour in chicken stock and bring to a boil.
08 - Reduce heat to low, cover, and simmer for 20 minutes, stirring occasionally, until rice is almost cooked.
09 - Add shrimp, cover, and cook another 5 to 7 minutes until shrimp are pink and rice is fully tender.
10 - Remove from heat. Discard bay leaves. Adjust seasoning and add hot sauce if desired. Garnish with spring onions and parsley. Serve hot.