For the black cod, add the fish to the marinade ... Spoon over two tablespoons of the marinade and then bake for 10-12 minutes, depending on the thickness of fish. Preheat the grill.
Season the cod with salt and pepper to taste. Mix the breadcrumbs with the parsley, garlic, lemon zest, salt and pepper, then add butter and lemon juice. Mix thoroughly with your fingers.
Spoon the mixture evenly over the cod fillets. Use the back of the spoon to smooth out the mayo mixture so that the top of each fillet is evenly covered. Bake in the preheated oven for twelve minutes.