Preheat oven to 400 degrees and grease a large baking pan. Arrange salmon fillets on the baking sheet and season generously with salt and pepper.
Stir together olive oil, garlic, herbs, and juice of ½ lemon. Spoon over salmon fillets being sure to rub all over the tops and sides of the salmon so it has no dry spots. Thinly slice remaining ½ of lemon and top each piece of salmon with a slice of lemon.
Bake for 12-15 minutes until salmon is opaque and flaky when pulled apart with a fork. You can broil the last 1-2 minutes if desired.
Garnish with fresh thyme or parsley if desired and serve.