La Santisima, formerly La Condessa Gourmet Taco Shop, has a pretty simple menu -- tacos, corn quesadillas, and burros -- although the flavors aren't limited to Sonoran, like at many restaurants in these parts. There's seafood from the coastal regions, Oaxacan black mole, Mexico City-style chicken tinga, and melt-in-your-mouth cochinita pibil from the Yucatán. Don't miss the outstanding salsa bar (cilantro crema and strawberry salsa are a couple highlights), and be sure to try the thirst-quenching horchata with pecans and fresh fruit.