This recipe for “Deep December Ragout of Seitan, Shiitakes and Winter Vegetables” has been posted a lot on various sites, and the source is listed as: CHEF DU JOUR CRESCENT DRAGONWAGON SHOW #DJ9339. Here’s a link to it. I love it because it is really flavorful and hearty. All I do differently than the original recipe is I use my own homemade seitan instead of store-bought. And if you don’t have Umeboshi vinegar around you can sub red wine vinegar.
I’ve made it a few times – most recently for New Years’ Eve 2012. The leftovers are really good, since the flavors seem to deepen and melow over time.