method
1. Heat the oil in a saucepan and cook the onions, covered, over a low heat for about 20 minutes, until translucent, stirring occasionally.
2. Add the stock and continue to cook for 1 hour more.
3. Puree in a foodmill or blender and reheat, adding a little water if necessary to thin the soup.
4. Pour into a soup tureen, mix in the Parmesan, sprinkle with the coriander and serve immediately.
serving amount
serves 6
rate this recipe