This is a concotion made up by my husband. It's quite tasty and worth the effort. I'm sure the marinade would be good with any type of tuna, we just happened to have yellow fin on hand. Preparation time does not include marinating, and is only an estimate...how fast can one dice?! Broil time is APPROXIMATE, depending on thickness of tuna - you may need to scale it back to 3-4 minutes per side, use your judgement! BTW, the relish does make a lot, I usually make it as stated, just to have some extra to use the next day on something else, you may want to halve it though, depending on your needs!