Bacalhau à Brás is a popular Portuguese dish made with salted codfish, eggs, onions, and thinly sliced potatoes. The codfish is first soaked to remove the salt, then cooked with onions and garlic. Thinly sliced potatoes are fried until crispy and mixed with the codfish and onions. Finally, beaten eggs are added to the mixture, creating a delicious and hearty dish. Bacalhau à Brás is a staple in Lisbon's culinary scene and can be found in many traditional Portuguese restaurants.