Season all sides of the steak with salt and pepper.
Transfer to a wire rack on top of a baking sheet, then bake for about 45 minutes to an hour until the internal temperature reads about 125°F for medium-rare. Adjust bake time based on steak being more rare or more well-done.
Heat avocado oil in a pan over high heat until smoke appears. Sear steak for 30-40 seconds on the first side, then flip.
Add butter, garlic, rosemary, and thyme and stir in pan.
Transfer garlic and herbs on top of steak and baste steak with butter using a large spoon. Baste for about 30 seconds, then flip and baste other side for about 30 seconds.
Turn steak on its side and cook to render off any excess fat.
Let steak rest on a cutting board or wire rack for about 10 minutes before cutting.
Slice steak into strips. Garnish with butter, peppercorn and thyme (optional) and serve immediately.