Salt Cod in Tomato Sauce

You find this dish, or one like it, everywhere there is salt cod—which is to say, almost everywhere in the North Atlantic and parts of the Mediterranean. I like the Spanish version, which is reminiscent of a strong pasta sauce. In fact, thinned just a bit, this would make an excellent sauce for pasta, though I still prefer it with crusty bread. You can poach almost any fish in this sauce—any white-fleshed fish will work, though cod is the most obvious and logical choice—but it will never have the character brought to the table by salt cod, especially if you take the time to fry it first, as in the variation.