If you refrigerated overnight, heat up. Otherwise, proceed as indicated. Bring the sauce, with the chicken breasts in it, to a boil, then simmer for thirty minutes. Once you reach this point, prepare the rice. While the sauce is cooking for thirty minutes, measure out your rice.
Rice is easy to cook.
I've never seen rice recipes expressed this way, but it would make a lot more sense if they were. One cup of uncooked rice, combined with two cups of liquid, produces three cups of cooked rice. Put a cup of uncooked rice in a saucepan, then add two cups of stock. If you cannot get Texamati, substitute River rice. If you can't get River rice, try at least to get a full-flavored rice.