Cream of Potatoes Soup

Description
In Romanian: Supa de cartofi (crema)

Ingredients

 * 2 qts/2 l water,
 * 1 lb/500 g potatoes,
 * 1 onion,
 * 1 cup sour cream,
 * 1 teaspoon flour,
 * 1 tablespoon chopped parsley,
 * 1 teaspoon butter,
 * salt,
 * toasted bread

Directions

 * 1) Boil the cubed potatoes with the finely chopped onion. When they are done, strain. Sieve the potatoes and thin with some of the boiling liquid.
 * 2) Add salt and set to boil. When the soup starts to boil, add the sour cream well mixed with the flour. Let boil for a minute or two, add the chopped parsley and butter. Serve with toast.