Just a few steps away from noisy 14th Street is this pretty little taqueria, housed inside a former post office and decorated with handsome Mexican tiles and grillwork, an old chandelier, and a vision of the Blessed Mother painted upon a worn plaster wall. It seats 45 max at a jumble of brightly colored tables; throughout Saturday and Sunday brunch (breakfast quesadilla, huevos rancheros, and Mexican fritters), and from weeknight happy hour on, all tables are usually occupied. The menu is short but affordable, featuring fresh, authentic tacos and custom-made quesadillas and tostadas. Favorites, like carnitas and fish tacos, are always on the menu, but the taqueria seems always to be inventing new tastes, like the shrimp, cauliflower, and cotija cheese tacos. Yucca fries, salads, guacamole, and other sides are available. The beverage list includes full bar offerings, and features Mexican aguas frescas (water blended with fruit, sugar, and other ingredients) prepared in the traditional nonalcoholic form, as well as mixed with rum or tequila; locally brewed draft beer; and a $6.95 margarita.