Expresion Oaxaqueña, located in the Mid-City district on Arlington Heights, is one of the most popular snack shops serving Oaxacan-style street foods among L.A.’s vast Mexican cuisine landscape. The menu lists everything from squash blossom empanadas — a cheese-engorged masa shell stuffed with sweet sauteed greens — to fried grasshoppers accented with lemon, chile and salt. Fresh spicy chorizo, long-simmered black beans and scrambled eggs drowned in red sauce make for a hearty breakfast. Like any self-respecting Oaxacan eatery, even one as casual as this, there is a dark ruddy mole negro on the menu, which can be served ladled over just about anything else, or tucked into a tasty tamale wrapped in wet banana leaves. For a meal in a hurry -- as most patrons seem to be -- try the hefty, mayo-soaked sandwich made from jerked beef, stewed beans, guacamole, salsa and lettuce, and known by the staff as the "Torta Sexy."