Marmitako is a hearty fisherman's stew that originated in the Basque Country and is a popular dish in San Sebastian. This comforting dish is made with fresh tuna, potatoes, onions, peppers, and tomatoes, simmered together in a flavorful fish broth. The combination of ingredients creates a rich and satisfying stew that is perfect for warming up on a chilly day. Don't forget to pair it with a crusty slice of bread to soak up all the delicious flavors.