Liver at 78 degrees: Liver and onions

Among the densest sources of iron and vitamin A in the food supply — and among the strongest-flavoured. Freshness decides everything: the best pieces need only salt and sesame oil raw. Because vitamin A stacks up quickly, this is a cut to eat occasionally rather than often. Bright cherry colour with a slight sheen and spring. Avoid dark, dull or waterlogged pieces.

Raw liver only from a trusted same-day source. When cooking, take it until the red centre is gone; a twenty-minute milk soak softens the edge of the flavour. Colour, sinew, where the fat sits, and thickness are what you check before you pay. Ask for the thickness that matches “Liver and onions.” Use 78 degrees and 78 when you cook. Salt after you know the job. Do not play with undercooked meat.

At the counter, read the use on Liver before the photograph. 78 degrees is the internal heat, “Liver and onions” is the dish, and 78 is the stage of the fire. Marbling alone does not split stew from grill. Vitamin-dense; buy bright and springy the day you cook. A cut’s grain comes from how much the muscle worked. Liver needs heat through to 78 degrees before “Liver and onions” makes sense. 78 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.