Quick Turnip Soup

1 large peeled and finely grated turnip
2 pints of milk
1 onion, puréed
1 tbl spoon cornflour
2 tbl spoons of melted butter
salt and pepper to season
parley to garnish
Heat the milk in a double boiler with the onion, add the flour and butter, which have been well blended, then the turnip, and salt. Cook until the turnip is tender, or for about 10 minutes. Sprinkle chopped parsley over the soup just before serving.