I forgot how much I really like cooked tuna. Sure I loved the canned variety in my childhood and still today, but years of restaurant industry 'seared tuna' and sushi somehow consumed the tuna aspect of my life. I know tuna gets cooked in some kitchens for 'tuna salad' for food cost reasons once it's shelf life is almost expired, but I was in a different direction. I was thinking about canned tuna... or canning it... or taking good quality fresh tuna and cooking it on purpose (yes, on purpose). Supermarkets typically carry the 2 varieties of can packs... H2O or oil (not counting albacore or species varieties... I'm talking about the packing medium). Although the springwater-packed is my lifetime choice, the thought of oil-packed pushed me to thinking about canning with added flavors or spices. I don't recall every seeing any 'gourmet' flavored tuna in the supermarket (haven't checked in quite some time, so I could be wrong on that). A basic example would be lemon caper canned tuna. Just pack your raw tuna in with the oil and other ingredients, cook to safe temperature, can.
Couldn't the same thing be done sous-vide... not that it's canning because it's not, but you could present it the same way as a menu item. Let's say... some yellowfin, capers, caper juice, lemon, black pepper, and olive oil. Place level in a bag and vacuum seal.
Then cook it for 25 - 30 minutes at 71C. Let sit at room temp for 45 minutes. Chill thoroughly in an ice bath. It isn't canned, but it's shelf life is significantly extended at this point (if you follow Goussault's HACCP plan for sous-vide) and all your initial product was safe.
You could then take the chilled contents of the bag, flake the tuna, and toss with a little mayo and mustard. Add in some other super secret umami boosting appropriate ingredient like nuoc mam and also using Kewpie as the mayo. Serve it with some flatbread crackers (or parmesan crackers). Sounds like a good menu item.
Simply tunafish... how come the word 'tuna' is interpreted as a hunk of fresh fish, and 'tunafish' typically refers to the canned variety? I like the word play... good menu material.