Preheat the oven to 425°F. In a large baking dish, season the fish fillets with salt and pepper.
Mix the Parmesan with the breadcrumbs, melted butter, olive oil, lemon zest and basil
Sprinkle the parmesan and breadcrumb mixture over the fillets. Bake for 15 minutes, or until the fish is cooked and the topping is golden.
Let stand for 5 minutes before serving.