Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper for easy cleanup.
Trim the tough, woody ends off the asparagus spears and place them on the prepared baking sheet.
Drizzle half of the olive oil over the asparagus and season with half of the sea salt and black pepper, tossing to coat evenly.
Roast the asparagus in the oven for 12-15 minutes until they are 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 the remaining salt and pepper.
Heat the remaining olive oil in a high-quality non-stick or cast-iron skillet over medium-high heat.
Place the salmon in the hot skillet, skin-side down, and sear for 4-5 minutes without moving it to ensure the skin becomes golden and crispy.
Carefully flip the salmon and cook for an additional 2-3 minutes until the flesh is opaque and flakes easily with a fork.
Plate the salmon alongside the roasted asparagus, garnishing with fresh dill and a generous squeeze of lemon juice before serving.