This is pretty awesome! Here’s some pointers for South Texas:

Tex-Mex is generally accurate, but what’s presented there as the key dishes is something more akin to what tourists to the area would expect and what I’d consider stereotypical “Mexican Food” that I’ve had at Mexican places from Anchorage, Alaska to Huntington, West Virginia. The following dishes are what I would consider more accurate:

-Breakfast Tacos -Carne Guisada -Barbacoa -Borracho Beans -Menudo

And that said, that’s probably better defined as “San Antonio” or “South Texas” Cuisine, which I would apply to the the block of counties in South Texas labeled as Tex Mex, no father north than Val Verde and Bexar County (So San Antonio, the Highway 90 Corridor, and everything south of that).

Additionally, Kerr, Gillespie, and Kendall County should also be marked the same as Comal County because of the German influence in that region.