01 - Whisk olive oil, lemon juice, Dijon mustard, minced garlic, chopped dill, parsley, thyme, salt, and black pepper together in a mixing bowl until fully combined.
02 - Pat salmon fillets dry with paper towels. Arrange fillets in a shallow dish or resealable bag. Pour marinade over salmon and turn fillets to coat. Let sit and marinate for 10 to 15 minutes at room temperature.
03 - Set the grill or grill pan to medium-high heat (about 400°F). Lightly oil the grill grates to prevent sticking.
04 - Lift the salmon from the marinade, allowing excess to drip away. Place fillets skin-side down on the grill and cook for 4 to 6 minutes per side, based on thickness, until the flesh is opaque and flakes easily with a fork.
05 - Transfer grilled salmon fillets to serving plates. Garnish with lemon wedges and extra fresh herbs as desired. Serve immediately.