Grate the onion and mix with the seasonings. Cut the fat off of the meat and slice diagonally.
Cook the beef fat in a frying pan for about 2 minutes until the juices come out. Cook the meat for 1 minute, then flip and cook for another minute. Add about half of the sauce, cover with a lid, and cook for about 30 seconds.
Remove the lid and add the remaining sauce. Coat for 30 seconds and you're done.
Story Behind this Recipe
Preparing steak with tough shoulder meat isn't that great all by itself, so I made some adjustments to it to make it a bit fluffier.
Cheap shoulder cuts are just fine for this dish. You can also marinate the meat before cooking.