Preheat the oven to 400°F and lightly grease a large baking pan. Arrange the salmon fillets on the pan, seasoning them liberally with salt and black pepper. In a small bowl, combine the olive oil, minced garlic, herb seasoning, and the juice from half of the lemon. Spoon this mixture over the salmon fillets, ensuring all surfaces are well-coated to avoid any dryness. Thinly slice the remaining half of the lemon and place a slice atop each fillet. Bake in the preheated oven for 12 to 15 minutes, or until the salmon turns opaque and flakes easily with a fork; for added crispness, broil during the final 1-2 minutes if preferred. Garnish with fresh thyme or parsley if desired before serving.