In an almost clandestine space in Madrid's Malasaña neighborhood, diners will find this highly personal proposition from the well-respected Diego Guerrero. With a focus on fusion cuisine, Guerrero's innovative menu features dishes such as a chawanmushi of octopus with coral of carabineiro and veal collagen with black trumpet mushrooms and caviar. The service is personal and highly professional. There are two tasting menus on offer, one with 15 courses and another with 18, along with a wine-pairing option. Closed on weekends.