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…