Preheat the oven to 450 °F.
In a large skillet, sauté the chopped onion with olive oil over medium-high heat for about 3 minutes. Add the carrots and cook for another 3 minutes.
Add the chicken and season it with salt, pepper, and your favorite chicken seasoning (Mrs. Dash Original Seasoning, Taco Seasoning, Old Bay Seasoning, etc.). Cook the chicken for 5-7 minutes.
Transfer the chicken to a medium casserole dish and add the rice and chicken broth. Stir well.
Cover the casserole with foil and bake for 40 minutes.