If you’ve ever been to Galicia, you may have been perplexed by the presence of tartan, Celtic jewelry, and buskers playing bagpipes. Wait a minute, you thought. I thought I was in Spain? Then the rainy landscape, green ferns, and white beaches made you think that maybe you hadn’t left home at all and were still in New Zealand. Until you ate some of the best and most unusual seafood of your life at lunch, looking out past the stone ruins on the headland to sea, a bottle of exquisite Albariño from nearby Rías Baixas on the table, and concluded...