Preheat the grill to medium-high heat.
In a small bowl, whisk together the olive oil, lemon juice, dried oregano, dried basil, dried parsley, garlic powder, salt, and pepper.
Place the salmon fillets on a large plate and pour the marinade over them. Let the salmon marinate for 10 minutes.
Grill the salmon fillets for about 4-5 minutes per side, or until they reach your desired level of doneness.
Serve the grilled salmon with lemon slices and fresh parsley for garnish.