Persian Ashe Reshtah
This is a Persian recipe, but is similar to the Afghan aush. 'Ash-e' means soup in Farsi. Persian noodles (Reshteh) are available in Middle Eastern food shops. Liquid kashke (whey) is available, but the quality isn't always good, so sour cream is preferable. Making the soup a day ahead of serving allows the flavors to better combine.