 Celtic law made specific provision with regard to cabbages and leeks, stating that they should be enclosed by fences for protection against wandering cattle.The two green vegetables were the only ones mentioned specifically in the laws, though uncultivated plants were still likely to be used in their cooking.The leek went on to be so important to Welsh cuisine—found in many symbolic dishes including cawl and Glamorgan sausage—that it became the country's national vegetable.