Hi. I'm a little late on answering this as I just joined the forum and was looking through the Madrid dining section. Having lived in Madrid most of my adult life, it's fun to see what peoples favorite restaurants are. I was a little disappointed not to find my old restaurant, La Gamella, mentioned. But I sold it in 2004 to retire and have not been back since I left Madrid. But it is still there. And doing well, I understand. Broken eggs (Huevos rotos in Spanish) are simply fried potatoes, usually french fries, with one or two fried eggs on top. You break the yolks on serving. Not complicated but if you do it well it's really delicious.