I've managed to acquire some ginkgo nuts. They're an interesting kind of food, the key feature is that it's toxic even after cooking. There's a neurotoxin in it. So of course it's eaten in Asia.
@piggo
You only really use a tiny amount that's perfectly harmless. Out of all the things Asians eat this one is one of the more normal ones.
@matrix yes that's also poisonous and I think psychoactive