Is 6.5 miles north on Beltline too far? If not, this is a great suggestion:
Rudy's Mexican - a little hole-in-the-wall place that's been here for more than 30 years. I've been going there my whole life. It's wonderful food, the hot sauce is pretty spicy, but you can usually ask for a 'mild' one. The meals are around $10 a plate at dinner, you know the $7-13 range. They're family owned and have very good service.
Here are some other reviews, but I'll tell you that as many times as I've been there I've never had any of these issues and they're small:
http://local.yahoo.com/info-18641002-rudy-s-mexican-resta...
I hope you go an enjoy!
I had the thought last night of Angelo's which is a great little Italian food place. They have very good thin crust pizzas, but they take a while to cook, so give yourself extra time for that. They're regular pasta dishes are good; things like spaghetti, chicken parmesean, lasagna, etc. They have steaks, but I wouldn't recomend them, because the food is cheap the steaks aren't very lean and very little seasoning. I'm going to have the rehearsal dinner for my wedding there because it's the cheapest restaurant in town and good. http://dallas.citysearch.com/profile/9531557/?brand=smx_r...