This is a light Californian chicken version of the Persian lamb Koresh, a thick, saucy stew. It is amainstay of the huge Persian-Jewish community in Los Angeles.
Put the split peas in a bowl, pour over cold water to cover, then leave to soak for about 4 hours. Drain well.
Heat a little of the oil in a pan, add two-thirds of the onions and cook for about 5 minutes. Add the chicken and cook until golden brown on all sides.
Add the soaked split peas to the chicken mixture, then the stock, turmeric, cinnamon and n