Sprinkle the meat with salt, pepper and your favorite spices, rub both sides. Add vegetable oil and rub again. Leave to marinate for 10-15 minutes.
Heat a frying pan with a little vegetable oil. Place the marinated steak in the pan and fry for 3-4 minutes on both sides.
Add butter to the juice that comes out of the almost cooked meat. Pour the resulting sauce over the steak for 1-2 minutes.
To make sure the steak is ready, make a cut - the juice should be clear, without blood or ichor.