Ingredients:
2 tablespoons of butter
1 medium sized onion
4 cups of chicken or vegetable stock
8 or 10 white button mushrooms
2 tablespoons of long-grain white rice
1 teaspoon of salt
1 large bunch of sorrel leaves
1 cup of coarsely chopped chive
Black Pepper
Garnish with thinly sliced sorrel
A drizzle of crème fraiche or sour cream