Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Snap the woody ends off the asparagus and place the spears on one side of the baking sheet.
Drizzle the asparagus with olive oil and season with a pinch of sea salt and black pepper, tossing to coat evenly.
Pat the salmon fillet dry with a paper towel and place it on the other side of the baking sheet.
Spread the Dijon mustard evenly over the top of the salmon fillet.
In a small bowl, combine the almond meal, dried parsley, garlic powder, and the remaining salt and pepper.
Press the almond herb mixture firmly onto the mustard-coated salmon to create a thick crust.
Bake for 12 to 15 minutes, or until the salmon is opaque and flakes easily with a fork and the asparagus is tender-crisp.
Remove from the oven and serve immediately with a fresh squeeze of lemon over the salmon.