Washing tomatoes, cleaning. Leave cherry tomatoes whole, cut remaining tomatoes into large pieces. Peel and chop onions. Dab meat dry. Heat the oil in a roasting pan and fry the meat in portions all around.
Put all the fried meat back into the roaster, add onions and fry briefly. Add tomato paste and sauté while stirring. Add tomatoes, season with salt, pepper, paprika and sugar.
Deglaze with 500 ml water, cover and braise at low heat for about 1 1/2 hours.
Wash the parsley, shake dry. Pluck off leaves and chop finely. Stir starch with a little water until smooth. Bind the goulash with it, bring to the boil, season to taste and serve. Sprinkle with parsley. Add sour cream.
It goes well with bread.