Bacalhau à Gomes de Sá is essentially a casserole

Casserole

A casserole, from the French for "saucepan", is a large, deep dish used both in the oven and as a serving vessel. The word casserole is also used for the food cooked and served in such a vessel, with the cookware itself called a casserole dish or casserole pan...

 of cod

Cod

Cod is the common name for genus Gadus, belonging to the family Gadidae, and is also used in the common name for various other fishes. Cod is a popular food with a mild flavor, low fat content and a dense, flaky white flesh. Cod livers are processed to make cod liver oil, an important source of...

, potatoes, eggs, olives, olive oil and onion

Onion

The onion , also known as the bulb onion, common onion and garden onion, is the most widely cultivated species of the genus Allium. The genus Allium also contains a number of other species variously referred to as onions and cultivated for food, such as the Japanese bunching onion The onion...

. It is a speciality from the northern city of Porto

Porto

Porto , also known as Oporto in English, is the second largest city in Portugal and one of the major urban areas in the Iberian Peninsula. Its administrative limits include a population of 237,559 inhabitants distributed within 15 civil parishes...

, being today popular throughout Portugal

Portugal

Portugal , officially the Portuguese Republic is a country situated in southwestern Europe on the Iberian Peninsula. Portugal is the westernmost country of Europe, and is bordered by the Atlantic Ocean to the West and South and by Spain to the North and East. The Atlantic archipelagos of the...

, and is considered one of Portugal's greatest bacalhau

Bacalhau

Bacalhau is the Portuguese word for codfish and—in a culinary context—dried and salted codfish. Fresh cod is referred to as bacalhau fresco .-Use:...

recipes.

Origin of the name

Gomes de Sá was the son of a rich nineteenth century merchant (apparently he dealt in cod) in Porto. The family fortune dwindled and the son had to find a job at the famous restaurant Restaurante Lisbonense in downtown Porto. It was there that he created the now well known recipe.