Cut the beef into thin slices and beat them.
Cut the onion into half rings.
Heat a frying pan and fry the onion until golden brown.
Heat a frying pan with vegetable oil and fry the beef on both sides over high heat for one and a half to two minutes on each side. Sprinkle the beef with flour on each side.
Add onion and spices to taste to the fried beef. Stir and fry together.
Add prunes and sour cream, stir, pour in a little water and simmer under the lid until done.
Remove the lid and simmer for a couple more minutes.
Serve the finished dish, garnished with fresh herbs.