Fistulina hepatica
With a root like stem.

About 6" wide.  Looked like it was growing out of the side of this oak stump.

Underside

When I removed it.  I found that it was growing out of forest litter beside the stump.  The cap broke off from what looked like a root like stem.  I managed to get most of the stem out.  Cap with the stem on the bottom.

Cap with stem/root placed in position.