From Spainrecipes.com; this is a classic dish called Merluza y Almejas En Salsa Verde that my abuela used to prepare; a recipe that is one of the front-runners of traditional Basque cooking. Salsa verde appears in many dishes: with clams alone, with monkfish or fresh cod, or with a combination of clams and hake, as in this recipe. Hake, a noble and expensive fish when caught in Cantabria's local waters and in the Bay of Biscay, is also available in the United States at good fish markets, where it is sometimes imported from Chile. Basque hake is better if you can find it: the flesh is tighter and tastier, and the skin is darker and very shiny. Prep time includes the time to purge the clams of their sand.