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 one side of the prepared 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.
Pat the salmon fillet completely dry with a paper towel and place it on the other side of the baking sheet.
Spread the Dijon mustard in an even layer 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 mixture firmly onto the mustard-coated salmon to create a thick crust, then drizzle the remaining olive oil over the top.
Roast in the oven for 12 to 15 minutes, or until the salmon flakes easily with a fork and the asparagus is tender and slightly charred.
Remove from the oven and immediately squeeze the fresh lemon juice over the salmon and asparagus before serving.