It's been a few years since I made this thing, so we made some yesterday for practice before I begin to serve it to friends for supper. Planning a bunch of suppers before Spring. Tried my version out on my father-in-law. He likes food.
If you asks him what restaurant he wants to go to tonight, he says one with food. But especially one with oysters, which is for tonight.
I use Julia Child's recipe, but I modify it a bit. My modifications: 3x as much garlic, lots of thyme sprigs from the garden, 1/2 cup of Port or some sugar, and a small handful of dried porcinis. Also, to keep it simple, I just throw in a bag of frozen pearl onions for the last 30 minutes of cooking. I do brown the fresh mushrooms and throw them in the pot for the last 30 minutes. I don't use the oven at all, just 3 hrs simmering on the stove.
Traditional ways to serve this is in a shallow bowl with french bread, or on a plate with (white) rice or roasted potatoes.
(Tip for those who like rich, earthy sauces: You can buy dried porcinis online, much cheaper than at the store. I buy them by the pound, but it doesn't take many to provide the flavor. You use the water you soak them in, too.)