Ash and osh Persian thick stewed soups

Ash (also romanized āsh or osh) is the broad Persian category of thick, hearty stewed soups, distinct from the clear broths (āb) of Iranian cuisine. Unlike Russian shchi (cabbage-based) or Hungarian gulyás (paprika-forward, meat-centric), ash is defined by its substantial body from legumes, herbs, grains, or noodles, often finished with a tangy kashk (fermented whey) garnish. Ash dishes carry deep cultural weight in Iran and the Persian diaspora, frequently prepared as nazr (vow-fulfillment) meals, cooked and distributed to neighbors or the needy after a prayer is answered.

Core varieties

Ash-e reshteh is the most iconic, featuring reshteh (thin wheat noodles), a mix of herbs (parsley, cilantro, spinach, dill, chives), chickpeas, kidney beans, and lentils, topped with sautéed mint oil, fried onions, and a generous swirl of kashk. It is a Nowruz (Persian New Year) staple, symbolizing abundance. Ash-e jow is a barley-thickened soup, often with turmeric and split peas, eaten as a nourishing winter dish. Ash-e doogh is a yogurt-based soup with rice, chickpeas, and dried mint, served hot or cold. Ash-e mast (yogurt ash) is a lighter variant common at Persian-Jewish tables, using yogurt as the base instead of kashk, sometimes with meatballs or spinach. Ash-e sholeh ghalamkar (“the everything soup”) is a dense, multi-ingredient Nowruz specialty containing dozens of herbs, legumes, grains, and dried limes (limoo amani), reflecting the Persian principle of sofreh (ceremonial spread) abundance.

Kashk garnish tradition

Kashk, a salty, sour fermented whey product (similar to dried buttermilk or qurut in Central Asia), is the defining topping for most ash dishes. It is rehydrated and drizzled over the soup, then garnished with na’na’ dagh (fried dried mint in oil) and piaz dagh (caramelized onions). Kashk is traditionally made from yogurt whey, but modern versions often use dried kashk blocks or powder. For those avoiding dairy, some ash recipes (e.g., ash-e reshteh without kashk) are naturally vegan.

Dietary notes

Many ash dishes are vegetarian-friendly by default, relying on legumes and herbs for protein. Ash-e reshteh, ash-e jow, and ash-e sholeh ghalamkar are typically vegan if prepared without kashk or meat broth. Ash-e doogh and ash-e mast contain dairy (yogurt, kashk) and are not vegan. Ash is generally gluten-containing due to noodles (reshteh) or barley; gluten-free versions substitute rice or chickpea flour. Kashk is not certified kosher or halal in most commercial forms, but homemade versions can be prepared under supervision. Persian-Jewish households often use Chalav Yisrael yogurt or kashk for ash-e mast.

Regional and diaspora variants

In the Persian diaspora, especially Tehrangeles (Westwood, Los Angeles), the largest Persian-American population center, ash-e reshteh is a restaurant and home-cooking staple. Afghan versions (āsh or osh) may substitute qurut (dried yogurt balls) for kashk and add meat. Kurdish and Azeri variants use local herbs like sümük (wild garlic). The core technique, slow-simmering legumes and grains until they break down into a porridge-like consistency, remains consistent across the Persianate world.