Preheat the grill to medium-high heat and lightly oil the grates to prevent sticking.
In a small bowl, whisk together the lemon juice, lemon zest, minced garlic, chopped dill, and chopped parsley.
Pat the salmon fillet dry with a paper towel and brush with half of the olive oil, then season with sea salt and black pepper.
Spread the prepared lemon-herb mixture evenly over the top of the salmon fillet.
Toss the asparagus spears with the remaining olive oil and a small pinch of sea salt.
Place the salmon on the grill, skin-side down, and cook for 5-6 minutes until the skin is crispy.
Flip the salmon carefully and grill for another 3-4 minutes until the center is opaque and flakes easily.
Grill the asparagus alongside the salmon for 4-5 minutes, turning occasionally until charred and tender.
Serve the grilled salmon over a bed of warm quinoa with the asparagus on the side.