If you can't find mahi mahi (I prefer wild caught), cod or another white fish will work just fine. If you can't find coleslaw mix, feel free to make your own. You'll want about 1½c shredded green cabbage, 1c shredded red cabbage, and ½c shredded carrots. Feel free to skip the tortillas if you're Paleo or doing Whole30. Just serve the fish with the slaw on top or on the side.