Cream of Sweet Potato and Parsnip Soup

This is a great soup, it's quite sweet and is great when the weather cools.

1. 1

   Chop the Onion, sweet potato, Carrot and Parsnips
   
   Melt the Butter in a pan and sweat the onion
   
   Add the carrot
   
   Take off the heat and stir in the Corn flour until everything is coated
   
   Return to the heat and stir in the stock gradually and add the remaining vegetables, the bouquet garni and the bay leaves
   
   Bring to the boil and then simmer for an hour, add additional liquid if reducing down too much
   
   Take off the heat and remove bouquet garni and bay leaves
   
   Blend until smooth
   
   Return to the heat and bring back to the boil, add the cream to taste, then and add salt and pepper to taste
   
   Once heated serve with Croutons