Preheat your oven to 400°F and line a baking sheet with parchment paper.
Dice the Russet potato into uniform 1/2-inch cubes to ensure even roasting.
Toss the potato cubes with the extra virgin olive oil and a pinch of sea salt on the baking sheet.
Roast the potatoes for 25-30 minutes, tossing halfway through, until they are golden-brown and crispy.
While potatoes roast, pat the top sirloin steak completely dry with paper towels to ensure a proper crust.
In a small bowl, whisk together the dried rosemary, dried thyme, garlic powder, remaining sea salt, and black pepper.
Press the herb seasoning mixture firmly onto both sides of the steak until well-coated.
Heat the ghee in a cast-iron skillet over medium-high heat until it begins to shimmer.
Sear the steak for 4-5 minutes per side for medium-rare, or until it reaches your preferred level of doneness.
Transfer the steak to a clean plate and let it rest for 5 minutes to lock in the juices.
Slice the rested steak against the grain and serve immediately with the crispy roasted potatoes.