If you are cooking ribeye steaks, you do not need any oil as the steaks have plenty of fat, but fillet steaks have a lot less, so add a tiny amount of olive oil to the pan, just enough to lightly ...
Cut the fillet steak in cubes and keep aside. In a separate pan, pour some vegetable oil (use the same oil for onions, it is flavourful) and fry the garlic and ginger. Saute for 2 minutes ...