Chicken with thyme

1 (3 1/2-4 lb) chicken , cut into pieces 1 carrot 1 celery 1 small white onion, halved 1 bay leaf 10 whole black peppercorns 1 1/2 teaspoons salt 1 To cook[...]

1 cup fresh mushrooms , sliced 2 stalks celery , sliced thinly 1 medium carrot , chopped 1 medium onion , diced 1 tablespoon butter 5 cups chicken stock 2[...]