Street tacos can be filled with grilled chicken, beef, pork or fish. They are characterized by their small, soft corn tortillas, opposed to crunchy shells or larger tortillas.  The tortillas are usually double stacked and small enough to easily maneuver with one hand.  The street tacos are served open faced piled with minimal toppings of guacamole or avocados, pico de gallo and sometimes Cotija cheese, then folded in half to eat.