Instructions
Preparation
1
Dry-brine the steak overnight by seasoning it with kosher salt on all surfaces and refrigerating it uncovered
2
Preheat the oven to 275°F
Cooking
3
Place the steak on a wire rack over a rimmed baking sheet and insert an oven-safe thermometer probe into the thickest part of the meat
4
Roast the steak in the oven until the internal temperature reaches 115°F
5
Remove the steak from the oven and let it rest for 5 minutes
6
Heat a cast-iron skillet over high heat for 4-5 minutes
7
Add oil to the skillet and sear the steak for 60-90 seconds per side
8
Add butter, garlic, and rosemary to the skillet and baste the steak aggressively
Finishing
9
Let the steak rest for 3-4 minutes after searing
10
Finish the steak with flaky sea salt and slice it thick