If using the oven, bake for 12–15 minutes. Set aside. If using the barbecue, drizzle some olive oil onto the rest of the lemon and char it on the grill. Add some of the olives to the sauce ...
Mix the breadcrumbs with the Parmesan and parsley and scatter over the fish and vegetables. Bake for another 12–15 minutes or until the fish is cooked, the ham has crisped and the breadcrumbs ...