Be sure you do some on the grill....just like a fillet mignon.....1.5" thick.....season and smear with mayonaise.....grill hot until cooked 1/3 in and flip to do same.....leaving mid 1/3 red as in fillet mignon.....
You may wish you hadn't canned so much.
I dunno about mayo, but indeed grilled tuna is about as good as it gets