Preheat your oven to 400°F (200°C).

In a mixing bowl, combine the panko breadcrumbs, grated Parmesan cheese, melted butter, garlic powder, parsley, salt, and pepper. Mix until the breadcrumbs are evenly coated.

Place the cod fillets on a parchment-lined baking sheet. Pat them dry with paper towels and season both sides with salt and pepper.

Drizzle the Dijon mustard and lemon juice over each fillet, ensuring an even coating.

Generously spoon the breadcrumb mixture over the top of each cod fillet, pressing down gently to adhere.

Bake in the preheated oven for 12-15 minutes, or until the fish is opaque and flakes easily with a fork. The topping should be golden and crispy.

Once cooked, let the cod rest for a few minutes before serving. Enjoy your delightful creation!