Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper for easy cleanup.
Wash the asparagus and trim away the tough, woody ends, then place the spears on one side of the prepared baking sheet.
Pat the salmon fillet dry with a paper towel and place it on the other side of the baking sheet.
In a small glass bowl, whisk together the extra virgin olive oil, minced garlic, finely chopped fresh dill, and the juice from half a lemon.
Drizzle the lemon-herb mixture evenly over both the salmon fillet and the asparagus spears.
Season everything with the sea salt and freshly cracked black pepper.
Bake for 12 to 15 minutes, depending on the thickness of the salmon, until the fish flakes easily with a fork and the asparagus is tender-crisp.
Serve immediately with an extra squeeze of fresh lemon if desired.