Defrost the fish fillets thoroughly before cooking.
Preheat your oven to 180°C.
Spray a medium-sized rectangular oven dish with non-stick spray or grease with butter.
Pat the fish fillets dry and place them in the oven dish so that they fit snugly next to one another.
Season with fish seasoning and salt and pepper to taste.
Drizzle with the juice of half a lemon.
Combine the breadcrumbs, parsley, garlic, lemon zest and melted butter or oil and mix well.
Season the bread crumb mixture well. I sometimes add fish seasoning into the crumb mixture as well as salt and pepper.
Sprinkle the crumbs over the prepared fish and top with grated hard cheese.
Bake for 20 minutes until the fish is cooked through and the crumbs are golden brown.