While the oven is pre heating to 450℉, in a hot large pan saute the onion with olive oil for about 3 minutes then add the carrots and continue to cook for another 3 -4 minutes minutes.
Add in the chicken and sprinkle the seasoning over it and cook for about 7 minutes.
Pour the contents from the pan into a casserole dish and add in the rice and broth. Give it a really good stir.