Mark S.
Yelp
We absolutely LOVED this place, where we dined on our first night of a weeklong trip to Madrid and Valencia. It was steps from our apartment (SmartRentals Atocha - also recommended), opened at the relatively early hour of 7:30 (a big plus for North Americans not used to waiting to 8:30, which is the earliest time at most other places).
What made this place so perfect was not just the food, which was great and made of the freshest ingredients, but also the guidance from our server, who helped us get not only perfect portion sizes to satisfy the group, in a great variety of half-portions, but also excellent wine selections to go with them at very decent prices.
We started off with some complementary seasoned potatoes, then moved into some excellent veggies: leeks and baby artichokes. The leeks seem to be a standard menu item (mentioned in all reviews, so I guess they are available year-round). The artichokes seem to be more of a spring seasonal offering, and you could cut them with a fork - just amazing with a glass of blanco (white wine). We also had the house cured salmon (which also seems to be a permanent menu item), and it was some of the best salmon ever. Lots of "best evers" here, you'll notice.
On to the heartier dishes: the pulpo (octopus) was revelatory - best I've ever had. The beef tartare was very good, but a more chewier cut than normal (the hand-cut one I had in Paris still sets the standard in this department). The canelloni was earthy and fantastic with a tinto (red) wine.
Feeling SO good at this point, we still had room for a couple of desserts to share: an apple "tart tatin" and a "coulant de chocolat", both under 7euros, both a great way to finish the meal.
As popular as this restaurant is (make reservations!), we left before most locals even began to arrive (twice as many people without reservations were turned away as there were people actually dining in - they keep the table for guests all night, I guess).
If you are staying anywhere nearby, or even if you aren't, make a reservation a week or 2 in advance, and absolutely go.