Preheat your oven to 400°F and line a baking sheet with parchment paper for easy cleanup.
Trim the woody ends off the asparagus and place the spears on the prepared baking sheet.
Drizzle the asparagus with 0.5 tablespoons of olive oil and toss with the garlic powder and half of the sea salt.
Roast the asparagus for 12 to 15 minutes until it is tender-crisp and slightly browned at the tips.
While the asparagus roasts, pat the salmon fillet completely dry with a paper towel to ensure a high-quality sear.
Season both sides of the salmon with the remaining sea salt and the black pepper.
Heat the remaining 0.5 tablespoons of olive oil in a stainless steel or cast-iron skillet over medium-high heat.
Place the salmon in the pan skin-side down and press gently with a spatula for 30 seconds to ensure the skin remains flat.
Sear for 4 to 5 minutes until the skin is golden and crispy, then flip and cook for another 2 to 3 minutes until medium-rare.
Plate the salmon alongside the roasted asparagus and finish with a fresh squeeze of lemon juice over the entire dish.