There is a new training center that is supposed to have its own restaurant, although I haven't been there and neither have most line guys since it is still being completed. You can bring your own food for lunch too if you like.
There are lots of local shopping options around the new hire hotel. People will have cars you can use or you can just Uber. I was in the DT for new hire and I ate the majority of my meals out of the microwave in my room and bought them from Trader Joe's or HEB.