01 - Place chicken pieces in a large Dutch oven or heavy pot. Cover with chicken broth, add bay leaf, and season with a pinch of salt. Bring to a boil, then reduce heat and simmer for 30 minutes, skimming off any foam that rises to the surface.
02 - Remove chicken from the pot and let cool slightly. Remove skin and bones, then shred the meat. Set aside. Discard the bay leaf from the broth.
03 - In the same pot, cook sausage slices over medium heat until browned, about 5 minutes. Add onion, garlic, celery, and bell pepper. Sauté until softened, about 6 minutes.
04 - Stir in the rice, paprika, black pepper, cayenne if using, and additional salt as needed. Return the shredded chicken to the pot.
05 - Pour in enough reserved broth to cover the ingredients (about 6-7 cups). Bring to a gentle boil, then reduce to low heat. Cover tightly and simmer for 25-30 minutes, stirring occasionally, until rice is tender and most liquid is absorbed.
06 - Remove from heat and let stand, covered, for 5 minutes. Fluff with a fork and garnish with chopped parsley before serving.