Follow these simple steps to prepare your own Lemon Butter Baked Cod at home:

1. Preheat Oven: Preheat your oven to 400°F (200°C).
2. Prepare Baking Dish: Lightly grease a baking dish with cooking spray or a tad of butter.
3. Arrange Cod Fillets: Place the cod fillets in the prepared baking dish. Ensure they are laid out in a single layer for even cooking.
4. Make Lemon Butter Sauce: In a small bowl, combine melted butter, lemon juice, minced garlic, parsley, salt, and black pepper.
5. Pour Sauce: Drizzle the lemon butter mixture over the cod fillets, ensuring they are well-coated.
6. Top with Lemon Slices: Arrange lemon slices on top of the fish for added flavor and moisture while baking.
7. Bake: Insert the baking dish into the preheated oven and bake for 15-20 minutes. The cod is done when it flakes easily with a fork and is opaque throughout.
8. Check for Doneness: If you have a food thermometer, the internal temperature should reach 145°F (63°C).
9. Remove and Serve: Take the dish out of the oven, garnishing with additional parsley or lemon wedges if desired.

With these straightforward steps, you can create a restaurant-quality dish in the comfort of your own home.