If you are in the Phoenix airport there are some good food options, my favorite are the sit down places, but if I don't have a lot of time, I will come here. I get the bowl, they put this sauce on it that is really good! It's a "crema" :). I've not tried their tacos or other dishes, but it's pretty decent for airport food. I would caution against ordering the chicken, it's not the best chicken, I would try the pork, beef, etc.
I haven't tried the fish either, but they do have fish tacos.
Happy Airport Eating!