Bilbao is located in Bizkaia, one of the 3 basque provinces. As in all the rest of the basque country people here are really proud about their food and dedicate lots of time.
Bizkaia is very famous in Spain for cod recipes. Bacalao (cod) is prepared here in different styles. Bacalao al pil pil is a very simple recipe in which cod and oil go hand in hand. Bacalao Bizkaina makes use of tomato and pepper. Marmitako is also a very famous dish. It used to be cooked by sailors while fishing in the sea. Tuna and potatoes are its main ingredients. Pisto Bilnbao style is a ratatouille that includes ham and egg. Gernika beans is also one of the most typical dishes. A very filling dish!

There is no precise rule as to how much to tip in Spain. Spaniards only tip if they consider the service to be good. A 5% is normally considered a good tip. Having said this, some local waiters know tourists tip more than local Spaniards do and may expect more from foreigners.