Step 1

Combine oil, lemon juice, thyme or oregano, garlic, and pepper in a large shallow bowl. Add fish to marinade, and turn to coat; cover with plastic wrap, and place in the refrigerator 30 minutes.

Step 2

Heat a grill or grill pan over medium-high heat. Remove fish from marinade, letting excess drip off. Place on grill, skin side down, and season with salt. Grill until skin is lightly browned and starting to crisp. Carefully turn fillets, and cook until well browned and cooked through (center will be opaque), 5 to 6 minutes. Garnish with chives and lemon wedges, if desired. Serve hot or at room temperature.