Supposedly a favorite of Caterina de’ Medici, although hers was made with cockscombs, hearts, and assorted other gizzards. Even people who claim they don’t like liver eat this up.
Finely chop an onion or a couple of shallots, and start cooking them in butter, extra virgin olive oil, or a little of both. After a few minutes, add about a half pound of the best chicken livers you can find. You could chop these up first, but raw liver is messy, so I chop them in the pan with a spatula and paring knife while they cook.
When the livers are about half cooked, sprinkle a couple spoonfuls of flour over them. Stir well, and let the flour cook for a couple of minutes. Add more fat if it’s too thick. Pour in about a cup of water, and, if you feel like it, a splash of white wine. Stir and continue cooking, adding more water if the mixture gets too thick. You want a consistency thick enough to spread, but not pasty.
After a few more minutes, remove from the heat and while the liver cools, separate 2 eggs (save the whites for a frittata) and mix the yolks with about a tablespoon of good wine vinegar (like Katz Orleans method Sparkling Wine). Stir the yolks into the liver, sprinkle in flor de sal to taste, and eat on cook crackers or bread.