Sour Soup with Green Beans

Ingredients

 * 2 qts/2 l water
 * 10 oz/300 g green beans
 * 1 onion
 * 1 carrot
 * 1 parsley root
 * 1 lb/500 g tomatoes
 * 1 tablespoon butter
 * 1 teaspoon flour
 * 1/2 cup sour cream or yogurt
 * chopped parsley and dill
 * salt

Directions

 * 1) Fry the finely chopped vegetables in butter, with the flour.
 * 2) Add the water, add the cut beans, salt and let boil at low temperature until the beans are tender.
 * 3) Add the boiled and drained tomatoes and let boil until completely done.
 * 4) Add chopped parsley and dill.
 * 5) Mix some sour cream in it when serving.