La Santisima is wonderful, one of my favorite local Mexican spots. The menu is unique (not your standard taco and burrito place) and they are cognizant of both vegan and gluten-free diets.
The best part is the salsa bar! They have several typical salsas, but they also have several unique salsas (strawberry is the best) and sampling each is part of the experience.
My favorite menu item are the quesas, it's like a fried corn quesadilla, but better.
It gets busy during dinner time, so plan accordingly!