This is a highly regarded counter style low priced Mexican restaurant in the Grand Central Market.
See the Yelp reviews at http://www.yelp.com/biz/las-morelianas-los-angeles#query:restaurants%20lunch
Don't want Mexican food, there are many other options at the Grand Central Market. To check out the Market go to http://www.grandcentralsquare.com/index.html
The Grand Central Market offers one hour free parking - with a minimum $10 purchase. The entrance to the Parking Structure is located at 308 South Hill Street. Validation is at the Information Desk.
The Metro Red Line Pershing Square Station is .2 of a mile from the restaurant.