I ran out of fresh mint, so I tore open a few pure peppermint teabags. Dried mint is a lot harsher than fresh mint, which probably didn't help. I also had to use some dark multi-grain bread, to keep things diet-friendly.
Verdict--uh...if someone made this for me, I'd eat it, but while tasty, I don't think it was worth the work. There would have been a lot less work if I'd found pre-shelled pistacios...