I'm quite sure that is a white choco disc, stensiled and sprayed. When I used to be creative I actually made a garnish. I pre-cut it to match the portion cut and lifted a little to add a fan effect. If that it what it is, it's just for show. Would be a mess serving or lift off the disc.
Hey! what the hell do I know, I now posative it's not that./img/vbsmilies/smilies/wink.gif