The perfect hearty soup
                
            
    What you'll need:
- 500g carrots, peeled and chopped
 - 500g parsnips, peeled and chopped
 - 2 onions, peeled and chopped
 - 1 tsp ground turmeric, optional
 - 1 tbsp ground coriander
 - 40g root ginger, chopped
 - 2tbsp vegetable oil
 - 1.4 litres vegetable stock
 - 3 tbsp natural yogurt, to serve
 - coriander leaves, to serve
 
Method:
- Heat the oil in a large saucepan or casserole dish.
 - Add the onions and a pinch of salt, and cook for 5 minutes over a medium heat until starting to soften.
 - Add the carrots, parsnips, ground spices and ginger and stir well to coat.
 - Cook gently on a low heat, covered for 10 minutes.
 - Add the stock, bring to a simmer and cook for 15-20 minutes, until the vegetables are completely tender.
 - Blend the soup until smooth, then season with salt and pepper, adding extra water if the soup is too thick.
 - Ladle the soup into bowls and top with a swirl of yogurt and coriander leaves