agree; haven't been to Dallas, but in Westminster/Garden Grove and San Jose, where latin american communities and Viet immigrant/vietnam communities happen to live in close proximity, the cultural mashups and innovation have been striking in both ways. Some of the most remarkable dishes in one of the most remarkable restaurants in SoCal that I've eaten in the past few years were conceived of and cooked by a Mexican-american chef who grew up surrounded by Vietnamese food in Garden grove
Because they're both very Catholic. My Catholic parish was filled with this exact mixing. Easter Vigil Mass would be said in three languages -- English, Spanish, Vietnamese, complete with Mexican-Vietnamese Catholic hymn mashups (singing versus of the same song in different languages, with each choir taking a verse, one verse would be accompanied by mariachi, and the next by an organ, etc... fun times)>