Equipment
Method
Preparation
- Begin by heating the olive oil in a large pan over medium-high heat. Season the beef slices with salt and pepper and sear them in batches until just browned. Remove the beef and set aside.
Building Flavors
- In the same pan, add the onions, stirring until soft. Add the garlic and mushrooms, cooking until the mushrooms are golden. This is where the dish starts to develop its deep, complex flavors.
The Sauce
- Stir in the mustard and then deglaze the pan with a splash of brandy or wine, scraping up any browned bits from the bottom. Add the beef stock and simmer until the liquid is reduced by half, infusing the sauce with richness.