Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper.
Trim the tough, woody ends off the asparagus and place the spears on one side of the prepared baking sheet.
Drizzle the asparagus with the extra virgin olive oil and season with a pinch of the sea salt and black pepper, tossing to coat.
Pat the salmon fillet 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, stir together the almond flour, dried parsley, garlic powder, and the remaining sea salt and black pepper.
Press the almond flour mixture firmly onto the mustard-coated salmon to create an even crust.
Place the sheet pan in the oven and bake for 12 to 15 minutes, or until the salmon flakes easily with a fork and the crust is lightly golden.
Remove from the oven and drizzle the fresh lemon juice over both the salmon and the roasted asparagus before serving.