For the longest time most thought of tuna as the cans you buy for 50 cents that you mix with mayo and put on bread. Tuna is much much more than that. Canned tuna is all the scraps and lesser quality tuna cooked way longer than it should be. It’s dry and bland. It needs tablespoons of mayo to be attractive to eat.
Tuna steaks can be really nice. You need to make sure the tuna is of good quality. Good tuna is deep read and stays together nicley when you slice it. Most tuna at the grocery store has been frozen, so I reccomend a fish market.
In my opinion, and that of most chefs, tuna should be seared all around and sliced. A nice tuna niscoise salad is great. Green beans, fingering potatoes and niscoise olives tossed in a simple dressing with your tuna sliced over top.
When I sear my tuna I use sesame oil and get it smoking hot and sear it all around until it’s a nice golden brown all around. I set it aside and let it rest a bit. Slice it thin, it’s relatively dense, the texture is nicer if it’s sliced tjin.
Eating fresh tuna raw is also nice. However when you eat raw fish you always need to make sure it’s never been frozen and it’s fresh. If it’s not fresh and it has been frozen i won’t usually eat it raw it’s just a safety thing. Being safe is the most important.
Poke is nice with tuna. It’s sliced red and green onions, soy sauce, sesame oil and the tuna diced small. It usually has a little more than that, but that’s the just of it. Raw fresh tuna of course is always nice on sushi.