Preheat your oven to 375°F (190°C) and lightly oil your casserole dish with oil or cooking spray.
Season both sides of the chicken breasts with a little salt, pepper, Italian seasoning, onion powder, and garlic powder.
In a large skillet, heat olive oil over medium-high heat. Once the oil is hot, sear the seasoned chicken breasts for about 2-3 minutes on each side until they are all golden brown. This step will lock in all the flavor of your chicken. Once seared, remove the chicken breasts from the skillet and set them aside.
In a large bowl, combine the cream of mushroom soup, cream of chicken soup, chicken broth, long grain rice, and onion soup mix. Stir the ingredients well to combine.
Transfer the soup mixture to the prepared casserole dish and place the brown chicken breasts evenly on top of the rice mixture in the casserole dish.
Cover the casserole dish with aluminum foil and place it in the preheated oven. Bake for 45-50 minutes or until the rice is cooked through and the chicken breasts are fully cooked.
Sprinkle crispy fried onions and then shredded cheddar cheese on top of the casserole during the last few minutes of baking for a wonderful cheesy finish, if desired.
Once done, remove the casserole from the oven and let it sit for a few minutes before serving to allow the flavors to meld together. Serve this tasty chicken breast casserole hot and enjoy!