Melt the butter, add the flour and some chicken stock, stirring to keep the mixture smooth. Add the vegetables and the rest of the stock. Cook until the vegetables are tender. Add the chicken meat and cream, then season to taste. This soup may be whirled in the blender to a puree, but it is almost better with the chicken and vegetables left diced. Garnish it with minced parsley, sprigs of watercress, or toasted almonds.