El Amigo Casiano runs the most frequented food stall in the market. That's always a good sign. They sell simple Mexican dishes and omlettes. They also serve very good breakfasts (it opens early) and have natural juices and delicious flavored waters. The price is really unbeatable and the quality of the food is very good. It is a perfect place to eat something quick and simple. A good way to eat on the street (a very common activity in Mexico) without worries.