2 tablespoons butter
1 tablespoon minced shallots
1 cup minced yellow onion
1 tablespoon minced garlic
1 tablespoon fresh thyme or 1 teaspoon dried thyme
5 cups assorted sliced mushrooms
1 cup white wine
5 cups vegetable or chicken stock
1 cup heavy cream
  Salt and freshly ground pepper (to taste)
1/4 cup snipped chives or flat leaf parsley (as garnish)