Remove the steak from the refrigerator 20 minutes before cooking to bring it to room temperature.
Pat the steak completely dry with paper towels and season both sides generously with sea salt and black pepper.
Heat the ghee in a heavy cast-iron skillet over medium-high heat until it begins to shimmer and smoke slightly.
Place the steak in the hot skillet and sear for 3 to 4 minutes without moving it to develop a deep golden-brown crust.
Flip the steak and cook for another 3 minutes for medium-rare doneness.
Reduce the heat to medium and add the grass-fed butter, smashed garlic cloves, rosemary, and thyme to the pan.
Tilt the skillet slightly so the melting butter pools at the bottom, then use a large spoon to continuously baste the steak with the foaming herb butter for 1 minute.
Transfer the steak to a cutting board and let it rest for at least 5 to 7 minutes to allow the juices to redistribute.
While the steak rests, add the green beans to the same skillet and sauté in the remaining herb butter for 4 to 5 minutes until crisp-tender.
Slice the steak against the grain and serve immediately alongside the buttery green beans.