Ok, the puffball caused quite a stir at the potluck!
It was duly revered, then sliced into 3/4" slices, then dipped in egg batter, then seaoned bread crumbs, then sauteed the slices until golden and slightly crisp on the outside in olive oil in a pan. A bit of salt and pepper. Yummy!
They were great! DH, who is leery of weird foods, said he loved it!

Regina is correct, and the big ones are quite safe to eat- there is nothing else that resembles it. It's kind of a fun novelty to collect from the wild and eat.

I still have a couple of slices left to make for DH again tomorrow.