I don't know if you can tell, but I love Mexican food. One of my fave places to go for lunch is Tres Jose's in Fort Worth.
They are only open Tuesday-Sunday, so you better not be craving this place on a Monday! They have terrific queso - totally different from other joints. It's pale - almost white - with fresh chiles, peppers and onions.
The lunch burrito is great. Try it with the beef fajitas, which are slightly smoky. The Tortilla Soup and Chicken Sandwich combo is great too - the bowl of soup is HUGE and filled with all kinds on fresh veggies, including big chunks of avocado (which they will leave out on request).
Be sure to pick up a lunch punch card - after purchasing eight lunches, you get one on them! They are very friendly there and usually punch your card more than once.