Sunday Steak with sherry vinegar

Method

1. Start by prepping your olive oil, garlic, yellow onion so the cooking goes quickly.
2. Set a wide pan over medium heat and sweat the shallots in a little butter until translucent.
3. Turn the heat up, add the steak, and cook until deeply browned and aromatic.
4. Stir in the kosher salt along with a good pinch of salt, scraping up anything stuck to the bottom of the pan.
5. Taste and adjust, then finish with flaky sea salt right before serving.
6. Serve warm, ideally with something to soak up the sauce.