c("Place the pumpkin, onion, turmeric, tomatoes, sugar, nutmeg and milk in a large  saucepan.", "Bring to the boil, cover and simmer for 15-20 minutes.", "Cool and  puree in a processor or blender.", "Return to the rinsed saucepan.", "Blend the  cornflour with a little yogurt.  Add to the soup with the remaining yogurt.   Bring to the simmering point but do not boil.", "Serve garnished with parsley and  a swirl of yogurt.")