Cut the meat into medium-sized strips. Marinate the cut meat using salt, ground black pepper and coriander.
Cut the onions into thin half rings and fry for 5 minutes in a preheated frying pan with sunflower oil poured into it.
Coat the meat strips in flour and place in a frying pan.
Fry the meat for 10 minutes, uncovered.
Mix water with sour cream, making it a liquid consistency. Pour the mixture into the frying pan with the meat being fried. Add flour and stir.
Salt and pepper the beef stroganoff and sprinkle with coriander again to taste. Simmer the dish for another 3 minutes over low heat. Adjust the thickness of the gravy by adding the required amount of water.
Remove the pan from the stove and begin preparing the dish for serving.