In the barrio of La Latina right in a beautiful little plaza that faces the San Andrés church you can find this cozy little restaurant.
The food is great, but if you get a chance you should make a reservation since there's not a lot of space. They also offer anything on the menu for take-out, not very common in Spain, so you can enjoy your meal in a plaza bench outdoors.
Phone number: +34 913 658 982
913 658 982