If there is any place where you can experience authentic Mexican food than it is El Fogon. It's a little overwhelming when you enter the restaurant in the first place and take a look at the menu but once you ordered your margaritas or beer you will find something nice in the menu.
I love the Arrachera Nortena which you can easily share with 2 or 3 persons.
You should not wear any clothes that you plan to wear on another day because everything will small like El Fogon.
Really great place to eat!!!