Heat olive oil in a large pot or Dutch oven over medium-high heat. Season the chicken with salt, pepper, thyme, and rosemary. Sear the chicken for 4-5 minutes on each side until golden brown. Remove chicken from the pot and set aside.
- In the same pot, sauté the diced onion for 3-4 minutes until softened. Add garlic and cook for another 30 seconds until fragrant.
- Add rice to the pot and stir it in with the onions and garlic, letting it toast for a minute. Pour in the chicken broth, lemon zest, and lemon juice. Stir to combine and bring the mixture to a simmer.
- Return the seared chicken to the pot, placing it on top of the rice. Cover the pot with a lid, reduce heat to low, and simmer for 20-25 minutes (for white rice) or 40-45 minutes (for brown rice) until the chicken is cooked through (internal temperature of 165°F/75°C) and rice is tender.
- Remove the chicken from the pot and fluff the rice with a fork. Serve the chicken on top of the rice, garnished with fresh parsley.