Polbo á perola is a typical Galician dish. Galicia is a region in northwest Spain known for its seafood cuisine, and Polbo á perola is a traditional Galician octopus dish. It is made by boiling octopus and serving it with potatoes, olive oil, and paprika. Sushi is a traditional Japanese dish, takeaway refers to food that is ordered to be taken away, and tortilla can refer to either a Spanish omelette or a Mexican flatbread. Therefore, the correct answer is Polbo á perola, as it is the only option that is specific to Galician cuisine.