This is a rich and tangy soup from Sapporo, the capital of Hokkaido, which is Japan’s most Northerly Island. Raw grated garlic and chilli oil are added to warm the body.
To make the soup stock, bruise the spring onions and ginger by hitting with a rolling pin. Boil 1.5 litres/2½ pints/6¼ cups water in a heavy pan, add the bones, and cook until the meat changes colour. Discard the water and wash the bones under running water.
Wash the pan and boil 2 litres/3½ pints/9 cups water, then add the bones and other stock ingredients exc