This is a very good recipe, and a nice way to use chard. As far as bunches goes, I picked chard until the 'bunch' was as much as I could hold in 1 hand, and that seemed perfect. we tried it as a brunch item, and it was wonderful. I was a little concerned about the amount of cinnamon, so only used 3/4t. the extra 1/4t probably wouldn't hurt it, but it wasn't necessary, either. I used bread crumbs, which were fine. the only change I would make would be to reduce the salt some, the taste was just a little salty for perfect for us. maybe 1/2t, or even a pinch less next time.
would have been nice if "two bunches" were quantified more specifically.