Bacalao a la Vizcaina is a classic Basque dish that features salted cod cooked in a rich tomato and pepper sauce. The cod is first soaked to remove the salt, then simmered with onions, garlic, tomatoes, and red peppers until tender. The resulting dish is flavorful and hearty, with the sweetness of the tomatoes balancing the saltiness of the cod. It is often served with crusty bread or potatoes.