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 them on the baking sheet with 1 teaspoon of olive oil, half the sea salt, and half the garlic powder.
Roast the asparagus for 12-15 minutes until tender and slightly charred.
While the asparagus roasts, pat the salmon fillet completely dry with a paper towel and season both sides with the remaining salt, pepper, and garlic powder.
Heat the remaining teaspoon of olive oil in a stainless steel or cast-iron skillet over medium-high heat until shimmering.
Place the salmon skin-side down in the pan and press gently with a spatula for 10 seconds to ensure even contact; sear for 4-5 minutes until the skin is crispy.
Carefully flip the fillet and cook for another 2-3 minutes until the salmon is just cooked through and flakes easily.
Serve the salmon immediately alongside the roasted asparagus with a fresh squeeze of lemon juice over everything.