soak mushrooms in water for 1 hour and drain. place in saucepan with water, onion, garlic, carrot and bay leaf. Bring to boil, then cover and cook over low heat for 1 hour. discard bay leaf. force through sieve. add potatoes, salt, pepper and pickles. cook over low heat for 15 minutes adding water if too thick. correct seasoning add parsley and serve.