01 - Preheat oven to 400°F. Line a baking dish with parchment paper or lightly grease it.
02 - Pat cod fillets dry with paper towels. Season both sides with salt and pepper, then drizzle with olive oil.
03 - Place cod fillets in the prepared baking dish, ensuring space between each piece for even cooking.
04 - Bake for 15 to 18 minutes, or until the fish is opaque throughout and flakes easily with a fork.
05 - While fish bakes, melt butter in a small saucepan over medium heat. Add minced garlic and cook for 1 minute until fragrant but not browned.
06 - Stir lemon zest, lemon juice, and capers into the butter mixture. Remove from heat and mix in fresh parsley.
07 - Transfer cooked cod to serving plates. Spoon warm lemon butter sauce generously over each fillet and garnish with lemon slices and parsley.