Some unusual urban foraging… can anyone identify these?

This was an unusual tree I noticed in my neighborhood and it took me some time to identify. But when I did I was delighted to learn it is quite edible.

Processing the seeds was a bit of a chore and I only ended up with a small handful for my trouble but it was still a fun experiment.

They are sweet and starchy, like a small chestnut. Tasty and if they were bigger they would be quite worth the effort.

So, test your ID skills: can anyone figure out what tree these are from? Hint: it’s a food I doubt many English speakers have ever tried, though it should look a little familiar…

https://slrpnk.net/pictrs/image/ea4f49c1-53c8-4366-b3cd-f6771695e8b6.webphttps://slrpnk.net/pictrs/image/a22d9193-bcc9-4503-bde4-11994a2aadc9.webphttps://slrpnk.net/pictrs/image/a0d7b02d-47b9-499f-9ef0-3954cc086830.webp

Answer if you give upCastanopsis, generally known as chinkapin, though not the same as North American chinkapins. Read more on Wikipedia: en.m.wikipedia.org/wiki/Castanopsis