Bacalhau à Gomes de Sá is a traditional Portuguese dish that is also popular in Rio de Janeiro. It consists of salted codfish that is cooked with onions, garlic, potatoes, olives, and olive oil. The result is a flavorful and comforting dish with tender pieces of fish and a delicious combination of flavors. Bacalhau à Gomes de Sá is often served as a main course, accompanied by a fresh salad or vegetables.