The American Museum of Natural History has an exhibition on the Silk Road. It looks pretty good, and there even seems to be a bit on agrobiodiversity. I mean apart from the obvious, the silkworm and the camel. In particular, you get a look at the night markets of Turfan.
Surprisingly, visitors to markets along the ancient Silk Road—long before overnight shipping and refrigeration—could also choose from an array of foreign delicacies. As travelers moved along trade routes, they introduced their own ingredients and recipes to foreign lands. Over time, such exotic edibles became familiar features on local menus.
Check the video at the 2:18 mark. Not bad, I guess. But was it too much to ask for — having come so far — to include something about the role of this trade route in the spread of at least crops like the apple and wheat?