Peel and chop the onion. Clean, wash and chop the mushrooms and peppers. Dab the goulash, dice it a little bit smaller if necessary
Fry the meat in hot oil in portions. Finally fry the onion, mushrooms and pieces of paprika. Add all the meat again. Season with salt, pepper and paprika. Stir in tomato paste. Briefly sauté the flour in it. Deglaze with 2 1/2-3 l water. Bring to the boil, stir in stock and simmer covered for 1 1/4-1 1/2 hours
Season soup with salt, pepper and ketchup. Wash the parsley, chop finely and sprinkle over the soup