Pat the steak dry with paper towels and season both sides with sea salt, black pepper, and garlic powder.
Heat the ghee in a cast-iron skillet over medium-high heat until shimmering.
Place the steak in the skillet and sear for 3-4 minutes per side for medium-rare, or until it reaches your preferred doneness.
Remove the steak from the pan and let it rest on a cutting board for at least 5 minutes before slicing thinly against the grain.
While the steak rests, toast the sourdough slice in a toaster or the oven until golden and crisp.
In the same skillet used for the steak, crack the egg and cook sunny-side up for 2-3 minutes until the whites are fully set but the yolk remains runny.
In a small bowl, toss the baby arugula with the lemon juice to lightly coat the leaves.
Place the toasted sourdough on a plate and layer the dressed arugula on top.
Arrange the sliced steak over the arugula and top with the fried egg.
Garnish with freshly chopped chives and serve immediately.