01 - Preheat oven to 400°F. Lightly grease a baking dish or line with parchment paper.
02 - Pat cod fillets dry with paper towels and arrange in 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 until well combined.
04 - Spoon herb mixture evenly over cod fillets, ensuring each piece is thoroughly coated.
05 - Place lemon slices on top of and around the fillets.
06 - Bake for 15 to 18 minutes until cod flakes easily with a fork and is opaque throughout.
07 - Remove from oven, garnish with additional herbs if desired, and serve immediately.