Preheat your oven to 400°F (200°C).
Prepare a baking dish by lightly greasing it with cooking spray or a bit of butter.
Place the cod fillets in the prepared baking dish and season with salt and pepper.
In a small saucepan over medium heat, melt the butter and add the minced garlic.
Add the lemon juice and zest to the melted butter and garlic.
Pour the garlic butter mixture over the cod fillets.
Bake in the preheated oven for 12-15 minutes, or until the fish is opaque and flakes easily with a fork.
Remove from the oven, garnish with fresh parsley, and serve immediately.