Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper.
Trim the tough, woody ends off the asparagus spears and place them on one side of the prepared baking sheet.
Drizzle the asparagus with 0.5 tbsp olive oil and a pinch of the sea salt, tossing to coat evenly.
Place the salmon fillet on the other side of the baking sheet and spread the Dijon mustard across the top surface.
In a small bowl, stir together the almond meal, lemon zest, dried parsley, remaining sea salt, and black pepper.
Press the almond herb mixture firmly onto the mustard-coated salmon to create an even crust.
Slide the pan into the oven and roast for 12 to 15 minutes, or until the salmon flakes easily with a fork and the asparagus is tender.
Serve immediately while the crust is golden and the vegetables are bright and hot.