This is a small dish that combines one fish prepared in 2 different ways: salted anchovy and fresh anchovy in vinegar. These 2 flavors work so well together that they are known as "matrimonio" (marriage). Canned anchovies are one of the most exquisite preserved foods in Spain, and fresh anchovies in vinegar are among the simplest and easiest to make: you marinate raw anchovy fillets in vinegar, garlic, and parsley, and add olive oil. Together they form the perfect mouthful, and are commonly found in bars all over Spain, especially between April and late summer, when this tiny but tasty blue fish is in season.