Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper.
Wash and trim the woody ends off the asparagus spears, then place them on one side of the baking sheet.
Drizzle the asparagus with half of the olive oil and season with a pinch of sea salt and black pepper, tossing to coat evenly.
In a small mixing bowl, whisk together the almond flour, lemon zest, dried parsley, dried dill, garlic powder, and the remaining sea salt and black pepper.
Pat the salmon fillet dry with a paper towel and place it on the other side of the baking sheet.
Brush the salmon with the remaining olive oil and lemon juice, then spoon the almond herb mixture over the top, pressing it down firmly to create a thick crust.
Roast in the center of the oven for 12 to 15 minutes, or until the salmon flakes easily with a fork and the crust is a beautiful golden brown.
Serve immediately with an extra squeeze of fresh lemon if desired.