Salt-Cod in Tomato Sauce

It was Basque fishers who first figured out how to use salt to preserve their vast cod hauls for transport and business across Spain. The Basque technique was adopted by other European cultures, but nowhere in the world does salt-cod reign supreme but in Spain and Portugal. It provided a cheap, year-round, reliable source of protein and therefore spawned scores of culinary uses over time. Bacalao is a good friend to tomato.