Preheat the grill or a cast-iron grill pan over medium-high heat.
In a small bowl, whisk together 0.25 tablespoons of the extra virgin olive oil, the lemon juice, lemon zest, dill, parsley, garlic powder, sea salt, and black pepper.
Pat the salmon fillet dry with a paper towel and brush the herb marinade evenly over the flesh side of the fish.
Toss the asparagus spears with the remaining 0.25 tablespoons of olive oil and a small pinch of additional salt.
Place the salmon on the hot grill, skin-side down, and cook for 4 to 5 minutes without moving it to ensure the skin becomes crispy.
Carefully flip the salmon and grill for an additional 3 to 4 minutes until the fish is opaque and flakes easily with a fork.
Add the asparagus to the grill during the last 5 minutes of the salmon cooking time, turning occasionally until tender and lightly charred.
Plate the grilled salmon and asparagus over the warm cooked quinoa and garnish with extra fresh herbs if desired.