01 - Preheat oven to 400°F. Lightly grease a baking dish or line it with parchment paper.
02 - Pat cod fillets dry with paper towels and place in the baking dish in a single layer.
03 - In a small bowl, whisk together olive oil, lemon juice, lemon zest, minced garlic, parsley, dill, thyme, salt, and pepper.
04 - Spoon the herb mixture evenly over the cod fillets, ensuring each piece is well coated.
05 - Arrange lemon slices on top of and around the fillets.
06 - Bake for 15-18 minutes, or until the cod flakes easily with a fork and is opaque in the center.
07 - Remove from the oven, garnish with extra herbs if desired, and serve immediately.