I saw this recipe on The Pioneer Woman's website and knew I had to try these.  They were great but there was really never any doubt that they wouldn't be.

French Onion Soup Stuffed Mushrooms
adapted from The Pioneer Woman

6 large stuffing mushrooms
2 Tablespoons butter
2 medium onions, sliced thin
1/4 cup beef broth
5-7 dashes Worcestershire sauce
splash of red wine
shredded Swiss cheese
dried parsley

In a medium skillet, over medium heat, melt 1 tablespoon of butter and add the onion, cooking for 15-20 minutes until the onions are very soft, stirring occasionally.  Add the splash of wine, Worcestershire sauce, and beef broth and cook for another 5 minutes until the liquid is cooked down.  Set aside.

Melt the other tablespoon of butter and toss in the mushrooms for a couple of minutes, just to start the cooking process. 

Place the mushroom on a baking try and fill with the onions.  Sprinkle the top with Swiss cheese.  Bake on 325 for 10 minutes.  Broil for a couple of additional minutes until cheese starts to bubble and starts to turn brown.  Sprinkle with parsley and serve.