Fish pie is a traditional dish made with a variety of fish, often including cod, salmon, and smoked haddock. The fish is typically cooked in a creamy sauce, which may include leeks, onions, and peas. This mixture is then topped with a layer of mashed potatoes, creating a comforting and hearty meal. The dish is usually baked until the top is golden brown and crispy. Fish pie is popular in many countries, particularly in the United Kingdom, where it is enjoyed as a family favorite. It can be served with a side of vegetables or salad for a complete meal.