Preheat your oven to 350°F. In a 9x13-inch baking dish, toss the chopped onion and minced garlic with olive oil. Place the dish in the oven for 10-15 minutes to warm and soften the aromatics.
As the onions and garlic become tender, coat the chicken thighs with paprika, dried thyme, rosemary, garlic powder, onion powder, salt, and pepper.
Remove the dish from the oven and mix the rinsed rice thoroughly with the softened aromatics. Place the seasoned chicken on top of the rice.
Gently pour the hot chicken broth around the chicken. Tightly cover the dish with foil and bake for 40 minutes.
Remove the foil and bake for an additional 10 to 15 minutes, until the chicken is cooked through and the rice has absorbed most of the liquid.
Remove the dish from the oven and let it rest for 5 minutes. Garnish with fresh parsley, if you like, before serving.