Preheat the oven to 350°F (175°C).
In a large skillet, heat olive oil over medium heat. Season the chicken breasts with salt, pepper, and garlic powder. Add them to the skillet, cooking until golden brown on both sides (about 5-7 minutes per side). Remove from heat.
In a medium mixing bowl, combine the cream of mushroom soup, sour cream, onion soup mix, and chicken broth. Mix well until all ingredients are fully incorporated.
In the bottom of a greased 3-quart baking dish, spread the uncooked rice evenly. Pour the soup mixture over the rice.
Place the browned chicken breasts on top of the soup mixture. Cover the dish tightly with aluminum foil.
Bake in the preheated oven for 45 minutes.
Remove the foil, sprinkle the shredded cheese over the top, and bake for an additional 15 minutes, until the cheese is melted and bubbly.
Once done, remove from the oven and let it sit for 5-10 minutes before serving. Garnish with fresh parsley if desired.