Tortilla Española, also known as Spanish omelette, is a classic dish in Madrid. It is made with eggs, potatoes, and onions, and is typically served in thick slices. The tortilla is cooked until it is golden brown on the outside and creamy on the inside. It can be enjoyed as a tapa or as a main course, and is often accompanied by a side of bread. Tortilla Española is a staple in Spanish cuisine and can be found in many restaurants and bars near the Royal Palace.