Crème de Carottes from Carol Jensen

.
Heat in a large heavy pot:
... 1/2 cup oil

Add:
... 1 small onion
... 2 potatoes, diced
... 1 celery stalk, sliced
... 1 pound carrots, peeled and sliced
Cover and simmer slowly for 15 minutes

Add
... 2 quarts chicken stock
... 2 parsley sprigs
... 1 tsp salt
... 1/2 tsp pepper
... a pinch of saffron
Cover and simmer for 30 minutes.

Puree in a blender, then add:
... 1 Tbl potato flour
... 1 Tbl worcestershire sauce