¾poundsirloin steak¼ inch thick, cut into 2 pieces
Salt and freshly ground black pepperoptional
Instructions
Melt 2 tablespoons of butter in a small saucepan over medium-low heat. Sauté the garlic for about 30 seconds. Add the mushrooms, salt, balsamic vinegar, and thyme. Cook until the mushrooms are tender, 4 to 5 minutes. Keep the sauce warm.
In an 8-inch cast-iron skillet, melt the remaining 2 tablespoons butter. Season both sides of the steak with salt and pepper, if desired. Cook the meat over medium-high heat, turning once, to medium done, 2 to 4 minutes each side. Serve with the mushroom sauce spooned over the top.
Notes
Although any skillet can be used, a cast-iron pan is recommended.Use an instant-read thermometer inserted into the thickest part of the steak to ensure accuracy when determining its doneness. Remove around 120°F (49°C) for rare, 130°F (54°C) for medium-rare, or 140°F (60°C) for medium.Slice the rested steak against the grain, which ensures tenderness. Serve the steak with the mushroom balsamic sauce drizzled over the top.