We just came back from another successful visit to the Rio Grande Valley—and quite a tour it was—Edinburg, Elsa, Weslaco, Harlingen, La Feria. We visited some of Tlacuache’s ancestors—recent and ancient. We pawed pumpkin empanadas, breakfast tacos, and other portable homemade goods. The outside of the empanadas in La Feria were lighter than any others I have had, so very tearable, and the filling was the most pumpkiny and least sweet. It was intense, earthy, and delightful. The food of South Texas and the region of the border known as the Rio Grande Valley, (RGV or just “The Valley” to locals) is a regional cuisine best understood by forgetting most of what you have ever heard about Tex-Mex. The term has been widely misused,…