I recently visited Jaleo (Crystal City), which is a short and beautiful walk from the metro, for restaurant week.
Bread was served with high quality olive oil with rosemary and garlic - very good. I ordered spinach with pinenuts, raisins, and apples and pan con tomate (rustic bread topped with crushed fresh tomatoes and manchego cheese) - both were very good. The fried, bacon wrapped dates are my favorite thing ever (though they are better at the downtown location). On the menu it says "como hace todo el mundo" (that you will want to eat every day) and they are not lying! They are the perfect combo of salty and sweet. The calamari was decent but not outstanding.