Boil the smoked bacon and soup vegetables in 2 l of water to make stock (after boiling, take out the bacon and soup vegetables). Soak the mushrooms in water and parboil them. Cut the bacon, onion and sausage and fry them up. Add the smoked bacon stock with fried up onion, bacon and sausage and parboiled mushrooms and the stock made of them. Add salt, bay leaves, allspice, black pepper, 2 cloves of garlic, and pour in the fermented rye flour. Boil for ca. 20 min., then add marjoram and parsley leaves and continue to boil for 10 min. Check the taste and season to taste. Serve the soup with hard-boiled egg and sour cream.