Polvo à Lagareiro is a popular Portuguese octopus dish. It is made by boiling the octopus until tender, then grilling it until it develops a crispy exterior. The octopus is typically served with boiled potatoes that are smashed and roasted in olive oil, garlic, and herbs. Polvo à Lagareiro is a flavorful and visually appealing dish that showcases the versatility of octopus in Portuguese cuisine.