Preheat your oven to 425°F (220°C) to ensure it's hot and ready for baking.
In a large mixing bowl, combine the panko breadcrumbs, grated Parmesan cheese, chopped parsley, minced garlic, lemon zest, smoked paprika, and a pinch of salt and pepper. Mix thoroughly until all ingredients are well combined.
In a separate mixing bowl, whisk together the mayonnaise and Dijon mustard until smooth and creamy.
Gently pat the cod fillets dry with paper towels to remove excess moisture. Season both sides of the fillets with a sprinkle of salt and freshly ground black pepper.
Evenly spread a thin layer of the mayonnaise mixture over the top of each cod fillet, ensuring a good coating for the breadcrumbs to adhere to.
Generously press the breadcrumb mixture onto the mayonnaise-coated side of each fillet, ensuring they are well covered and the crumbs adhere securely.
Drizzle a small amount of olive oil over the crusted tops of the fillets to enhance the flavor and help achieve a golden finish.
Arrange the cod fillets on a parchment-lined baking sheet, ensuring they have space in between. Bake in the preheated oven for about 12-15 minutes, or until the fish is opaque and flaky and the crust is beautifully golden and crispy.
Once baked, remove the cod from the oven and allow the fillets to rest for a couple of minutes before serving, which helps to lock in moisture.
Notes
Serve on a bed of sautéed spinach with lemon wedges for added flavor.