Preheat a broiler grill to hot and the oven to 200C or 180C Fan or 400F or Gas 6
Make the crust by combining the breadcrumbs, lemon zest, thyme, parmesan, salt, and pepper.
Lay the flour, egg, and breadcrumb mix out on separate plates. Press the top of each cod steak into the plain flour. Shake off the excess, then press it into the egg mix. Shake off the excess. Then dip the cod steaks into the breadcrumb mixture.
Spray the bottom of a baking tray, then lay the breaded cod in a single layer, breadcrumb side up. Spray each fillet with some oil or cooking spray.
Bake for 12-14 minutes until the cod is just cooked.
Place the cod under the broiler grill for 1-2 minutes until the breadcrumbs are crisp and golden brown.
Served scattered with fresh parsley.