We joined a tour in Inner Mongolia, and like most tour food, there is nothing too notable except that they succeeded in feeding me an (almost!) all vegetable meal for 3 days. But I suppose that just fits because Inner Mongolia is known for its vast grasslands, and since it is difficult to travel (very cold and there are long distances between cities), families have to cultivate vegetation and there aren't too many meat sources in the neighborhood (fish is out of the question).
I've noticed that there are a lot of horses in Inner Mongolia, though, probably needed for the traveling that they do. Hence they also offer a lot of horse-based products.