Preheat your oven to 400°F (200°C) and line a small baking sheet with parchment paper.
Trim the woody ends off the asparagus and toss the spears on the baking sheet with olive oil, a pinch of sea salt, and black pepper.
Roast the asparagus for 12-15 minutes until tender and slightly charred at the tips.
While the vegetables roast, pat the salmon fillet completely dry with a paper towel and season both sides with garlic powder, remaining sea salt, and black pepper.
Heat the ghee in a cast-iron or heavy-bottomed skillet over medium-high heat until it begins to shimmer.
Place the salmon skin-side down in the hot pan and press down gently with a spatula for 10 seconds to ensure even contact; sear for 4-5 minutes until the skin is golden and crispy.
Carefully flip the fillet and cook for another 2-3 minutes, or until the salmon is just cooked through and flakes easily with a fork.
Plate the salmon alongside the roasted asparagus and finish with a fresh squeeze of lemon juice over everything.