01 - Preheat oven to 375°F.
02 - Melt butter in a large oven-safe pot or Dutch oven over medium heat. Add onion and garlic, sautéing until soft and fragrant, approximately 3 minutes.
03 - Stir rice into the pot and toast for 2 minutes until coated in butter and aromatics.
04 - Add chicken broth, heavy cream, cream cheese, Parmesan, Italian dressing seasoning, salt, pepper, thyme, and paprika. Stir continuously until cream cheese melts and mixture is fully combined.
05 - Place chicken breasts over the rice mixture. Spoon sauce generously over the chicken. Tuck baby spinach into the sides of the pot if using.
06 - Cover pot tightly with lid or aluminum foil. Bake for 40 minutes.
07 - Uncover and verify rice is tender and chicken reaches internal temperature of 165°F. If needed, continue baking 5 to 10 minutes longer. Optionally broil for 2 minutes to brown the top.
08 - Let rest for 5 minutes before serving. Garnish with chopped fresh parsley.