01 -
Remove the steak from refrigeration and season both sides generously with sea salt. Allow it to rest at room temperature for 30 to 45 minutes to ensure even cooking.
02 -
Heat a cast iron skillet over medium-high heat for approximately 5 minutes. Add avocado oil and heat until shimmering.
03 -
Place the steak in the skillet and sear for 3 to 4 minutes on each side until a golden-brown crust develops. Add butter and continuously baste the steak to enhance flavor and moisture.
04 -
Use a meat thermometer inserted into the thickest part to measure internal temperature. Target 52°C for medium-rare. Adjust cooking duration based on desired doneness.
05 -
Transfer the steak to a plate, tent loosely with foil, and rest for 5 to 10 minutes to allow juices to redistribute.
06 -
Reduce skillet heat to medium. Sauté minced garlic and chopped shallot for about 2 minutes until softened. Deglaze with red wine and beef broth, scraping the skillet bottom to incorporate browned bits. Simmer until liquid is reduced by half, approximately 3 to 4 minutes.
07 -
Whisk in Dijon mustard followed by heavy cream. Allow the sauce to simmer for an additional minute until thickened. Season as needed.
08 -
Slice the steak against the grain, drizzle with the prepared pan sauce, and serve immediately.