Yes, but for my recipe you’ll want to use cooked rice. Since it’s a “leftovers” casserole both the chicken and rice need to be cooked ahead. Then they’re just combined with the other ingredients and baked until hot.  For other recipes, you may not have to cook it first – always read the recipe first to check! Rice that is added to a casserole raw will take 30 to 40 minutes to cook, but that time will vary depending on the other ingredients. For my recipe, there’s not enough liquid for uncooked rice to absorb.