Bear in mind that a commercial grower's perspectives are different from the home grower's. They have access to irrigation, herbicides, pesticides, fungucides, etc.
They're also growing for a commercial market, not personal use. They won't be growing, for example, quinoa; that's almost all imported from Bolivia. The ones you want are generally the Chilean varieties. I'm growing some out right now. Astonishingly they grow almost equally well on both sides of the Cascades, despite differences in climate. Aside from temperature and day-length sensitivities a surprisingly adaptable crop. I just got back from visiting mine, which is busy blooming.
Because it's on the dry side, quite a few tree fruits will do well there, once you get them established. Check if anybody grows apricots. One risk with apricots is late frosts, so check that. Apricots are very coldhardy but they bloom readily once it turns warm, and so the blossoms can freeze if a frost occurs after it starts warming up. In habitat, seasons change very decisively due to massive warm or cold front, so they're not used to changeable weather.
I think plums used to be common out that direction, before globalization favored grapes (= wine = export crop). Grapes probably not a bad choice either for that matter.
OH, you must grow tomatoes! You'll be in nearly perfect tomato country. The slightly warmer and drier summers are good for ripening tomatoes, without being so hot the tomatoes can't pollinate (a common problem in the deep south). Get some from Tom Wagner. He might even want to come visit them.