Whip up the stuffing. Recipe here, I'm not going to repost it because the magic is what happens after the mushrooms are done.
But whoa! Look at how much stuffing you have left! What to do...
I added a cup of heavy whipping cream to the bowl and came up with this:
Voila! Two appetizers for the effort of one. And I'm sure that you could add alfredo sauce instead of cream if that is what your taste buds desire. Bon appetit!