Preheat and prep. Heat your oven to 400°F (200°C). Line a baking sheet with parchment or lightly oil it.
Pat the salmon fillets dry with paper towels for the best sear and texture.
Make the lemon herb mixture. In a small bowl, combine 2 tablespoons olive oil (or melted butter), the zest of 1 lemon, 1–2 tablespoons lemon juice, minced garlic, and 2–3 tablespoons finely chopped fresh herbs. Season with 1/2 teaspoon salt and 1/4 teaspoon black pepper. Add a pinch of red pepper flakes if you like spice.
Season the salmon. Place fillets skin-side down on the baking sheet.
Brush or spoon the lemon herb mixture evenly over the tops and sides. If using, tuck a few thin lemon slices around the fish.
Roast to perfection. Bake for 10–12 minutes for 1-inch-thick fillets, or until the salmon flakes easily with a fork and the center is just opaque. For extra color, switch to broil for the last 1–2 minutes, watching closely.
Rest and finish. Let the salmon rest for 2 minutes.
Taste and finish with a light sprinkle of salt, a squeeze of lemon, and more fresh herbs.
Optional side. Roast low-carb veggies on a second tray: toss asparagus or broccoli with oil, salt, and pepper, and roast at the same temperature for 12–15 minutes.