01 - Preheat oven to 400°F. Line a baking sheet with parchment paper or lightly grease it.
02 - In a small bowl, combine olive oil, lemon juice, minced garlic, sea salt, black pepper, paprika, and parsley.
03 - Pat the cod fillets dry with paper towels and place them on the prepared baking sheet.
04 - Brush each fillet generously with the marinade, coating both sides thoroughly.
05 - Arrange lemon slices on top of the cod fillets.
06 - Bake for 15 to 18 minutes or until fish is opaque and flakes easily with a fork.
07 - Remove from oven, garnish with fresh parsley if desired, and serve immediately.