Onions peel and cut into slices. Dab meat dry. Heat the oil in a roasting pan and fry the meat thoroughly. Add onions and fry briefly. Season with salt and pepper.
Stir in the tomato paste. Dust with flour and deglaze with red wine and 3/4 litres of water, bring to the boil. Add bay leaf and cook for 1 1/4 hours. Peel, wash and chop celery, carrots and parsley roots.
Add to the meat 30 minutes before the end of the cooking time. Put dumplings in boiling salted water and simmer for 7 minutes at medium heat. Wash parsley and chop finely. Pour dumplings onto a sieve and drain.
Melt the fat in a frying pan, toss the dumplings and parsley in it. Season the goulash again and serve with the dumplings.