Arrange all the ingredients conveniently. Wash and dry the pork. Peel the onion.
Prepare the meat for the dish. To do this, cut the pork into pieces up to 2 cm thick. Using a kitchen hammer, beat each piece of pork on both sides. After beating the meat, cut it into strips up to 1 cm wide.
Fry the meat. Place the frying pan on the fire, heat the vegetable oil and butter in it. Dip the pork cut into strips in flour and place in a frying pan. Fry the meat over high heat for 2-3 minutes, stirring constantly and uncovered.
Cut the onion into half rings and add to the frying pan with the meat. Fry for 5 minutes over medium heat, stirring.
Pour in sour cream. Turn the heat to low and cover the pan with a lid, continue to simmer the beef stroganoff for 20-25 minutes.
Taste the meat for doneness. If it is still hard and the sauce has thickened, add a little water and continue cooking.
To fully experience the delicious, melt-in-your-mouth meat, you can serve it as a separate dish or with a side dish. Boil your favorite type of pasta in salted water for 7-10 minutes, season with butter.