Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Trim the tough, woody ends off the asparagus and place the spears on one side of the baking sheet.
Drizzle half of the olive oil over the asparagus and sprinkle with half of the sea salt and black pepper, tossing to coat evenly.
In a small bowl, whisk together the almond flour, dried parsley, and garlic powder until well combined.
Pat the salmon fillet dry with a paper towel, then brush the top surface with the Dijon mustard.
Press the almond flour mixture firmly onto the mustard-coated salmon to create an even crust.
Place the salmon on the other side of the baking sheet and drizzle the remaining olive oil over the crust.
Bake for 12-15 minutes until the salmon is opaque and flakes easily with a fork, and the crust is beautifully golden.
Serve the salmon and asparagus immediately with a fresh squeeze of lemon over the top.