[Suicide Junkie]

All you'd have to do is grab the circle-selection tool, pick off the dish, and hit copy / paste... then reduce to about 15% and drag it to the middle of the existing dish.

Take a black brush, and zoom way in to just simply shave off the faceted edges on the perimeter.
The portrait looks like it has about 16 sides instead of being a circle at the moment, because of the inherent issues with meshes that don't have insane numbers of polygons in them.