This is a combination of two recipes I found while looking around on the internet. One didn't have the sesame seeds and one had the sauce I wanted. So I mixed ideas. If your tuna isn't bright red and it flakes apart you won't want to use it for this dish. I am finding if it isn't the right color and isn't fresh it does not taste right. I have purchased steaks in individual plastic packs that have been pre-frozen from the fish counter with good results. In the picture you see it with a vegetable it is Recipe #91301.