Just east of Dallas, Terrell is a practical town that still knows how to take a lunch break. Frank's BBQ can cover you fast with brisket and a plate that does not need explanation. It is a good reset when the day has been all errands and traffic.
If you want another option, Soulman's Bar-B-Que is nearby and steady, a barbecue restaurant choice for ribs or smoked sausage. Time it for midday and you will get a true BBQ plate lunch feel. Keep it simple and you will be back on your way without thinking twice.