01 - Preheat your oven to 375°F (190°C).
02 - In a large oven-safe pot or Dutch oven, melt the butter over medium heat. Add the onion and garlic, sautéing until soft and fragrant, about 3 minutes.
03 - Stir in the rice and toast for 2 minutes, ensuring it is coated in butter and aromatics.
04 - Add chicken broth, heavy cream, cream cheese, Parmesan, Italian dressing seasoning, salt, pepper, thyme, and paprika. Stir until the cream cheese melts and the mixture is combined.
05 - Arrange the chicken breasts over the rice mixture. Spoon some of the sauce over the chicken. If using, add baby spinach by tucking it into the sides.
06 - Cover the pot with a tight-fitting lid or aluminum foil. Bake for 40 minutes.
07 - Uncover, check that the rice is tender and the chicken cooked through (internal temperature should reach 165°F/74°C). If needed, bake 5–10 minutes longer. Optionally, broil for 2 minutes to brown the top.
08 - Rest for 5 minutes. Garnish with parsley before serving.