Creamy Carrot Soup - cooking recipe

Ingredients

1 Tbsp. butter or oil
3 medium leeks, sliced thin
1 lb. carrots, sliced thin
1/2 lb. small potatoes, quartered
1 large rib celery, sliced thin
5 c. defatted chicken stock
1 1/2 tsp. tarragon leaves, crushed
salt, white pepper and chopped watercress (optional)

Preparation

This elegant soup uses no cream.
Potatoes are the thickening secret.