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 a cast-iron skillet over medium-high heat until it is very hot and slightly smoking.
Place the steak in the dry skillet and sear for 3-4 minutes without moving it to develop a deep, crispy crust.
Flip the steak and immediately add the ghee, smashed garlic cloves, and fresh rosemary to the pan.
Tilt the skillet slightly and use a large spoon to continuously baste the steak with the melting garlic-herb ghee for another 3-4 minutes.
Remove the steak from the pan and let it rest on a cutting board for at least 5-8 minutes.
While the steak rests, steam the broccoli florets and cherry tomatoes for 4-5 minutes until the broccoli is bright green and tender-crisp.
Slice the steak against the grain and serve alongside the steamed vegetables, drizzling any remaining pan juices over the top.