Preheat the oven to 375 degrees Fahrenheit and grease a 9x13 baking dish.
Pour the uncooked rice into the bottom of the dish.
In a small bowl, whisk together the chicken broth, lemon juice, olive oil, oregano, and garlic powder. Pour this over the rice.
Place the chicken breasts on top of the rice and liquid.
Cover the dish tightly with aluminum foil.
Bake for 45 minutes, or until the liquid is absorbed, the rice is tender, and the chicken reaches an internal temperature of 165 degrees Fahrenheit.
Garnish with fresh parsley before serving.