How to cook fresh tuna? I have no idea.

Do you have a chimney style charcoal starter?

Keep it on ice. Meet me off of I-10 tomorrow, and I'll take it off your hands.

Seriously though, take off skin to make steaks. Season and sear hot, as the previous poster said. Enjoy!

Don't overcook it

take the skin off with a filet knife
cut into steaks about 2" thick
get a cast iron pan screaming hot, it should be smoking and white
brush the steaks with oil, then salt and pepper
slap them on the hot iron and walk away for 60 to 90 seconds
flip and do it again

remove, sauce as desired or not

What does rinsing with water do to it?

Poke is real damn good with it.

Please, please, please don't cook it much. Very few things in the culinary world makes me as sad as a cooked through tuna steak.

Actually, if you don't get the pan too overly hot, you can press the steak into some sesame seeds and cook it very quickly on that side first, which will give it a nice presentation.

How'd it turn out?

Ahhh...the good old days when I could pull into Jason's Off the Hook on Airline and purchase killer tuna