Know Nut November #10 - eviltoast

Despite their drab color, I find these quite beautiful!

I expect this one will be fairly easy, so the next one I post will be a bit harder.

Need a hint?

spoiler

It’s in season right now, and is often cooked in a seasonal dish…

. . .

Photo by Geo Lightspeed7 - Own work, CC BY-SA 4.0, Click here for source and answer.