Otoro at 55 degrees: Lightly seared · 365

The forward belly, and the summit of tuna fat. Everything this cut is worth comes down to a fat density that starts melting the moment it meets body temperature. The fat striations should run close together and evenly, without breaking up. Straight from the fridge it stays mute; a few minutes out and the fat opens up completely.

Colour, sinew, where the fat sits, and thickness are what you check before you pay. Ask for the thickness that matches “Lightly seared.” Use 55 degrees and 55 when you cook. Salt after you know the job. Do not play with undercooked meat. Cook Otoro to 55 degrees and serve it as “Lightly seared.” The other figure to watch is 55. Do not time a hard-working muscle like a thin steak. Colour before heat is not doneness. Sold by fat band, not BMS — colour and cold-chain beat a stamp.

Cook Otoro to 55 degrees and serve it as “Lightly seared.” The other figure to watch is 55. Do not time a hard-working muscle like a thin steak. Colour before heat is not doneness. Sold by fat band, not BMS — colour and cold-chain beat a stamp. A cut’s grain comes from how much the muscle worked. Otoro needs heat through to 55 degrees before “Lightly seared” makes sense. 55 is a stage of that heat, not a luxury score. The same cut becomes a stew, a grill, or a braise, so a steak minute does not cover a pot. Thick connective tissue wants time, not a hard sear alone. This is not medical advice.