Preheat your grill or grill pan to medium-high heat.
Pat the salmon fillet dry with a paper towel to ensure a good sear.
In a small bowl, whisk together the olive oil, dried oregano, garlic powder, sea salt, and black pepper.
Brush half of the herb oil over the salmon fillet and toss the remaining half with the asparagus spears.
Place the salmon on the grill, skin-side down, and cook for 4-5 minutes until the skin is crispy.
Add the asparagus to the grill alongside the salmon.
Carefully flip the salmon and grill for another 3-4 minutes, turning the asparagus occasionally until tender and lightly charred.
Remove the salmon and asparagus from the heat.
Drizzle the fresh lemon juice over the salmon and garnish with lemon zest and chopped fresh parsley before serving.