This is a well-known Persian dish of chicken with a pomegranate and walnut sauce. Khoresht Fesenjan should be served with white rice.
Heat the oil in a large heavy skillet over medium heat. Stir in sliced onions; cook and stir until the onion has softened and turned translucent, about 5 minutes. Reduce heat to medium-low, and continue cooking and stirring until the onion is very tender and dark brown, 15 to 20 minutes more.
Raise heat to medium-high. Add chicken pieces, and fry until lightly browned on the outside. Pour in the water (2 cups), and bring to a boil. Reduce heat to low and simmer for about 30 minutes, adding more water if necessary to keep the mixture from drying out.
Preheat the oven to 325 degrees F (65 degrees C).
Combine the walnuts and pomegranate juice in the container of a blender or food processor. Process into liquid. (This can be done in small batches if necessary.) Add walnut-pomegranate mixture to the simmering chicken. Season with cardamom, cinnamon, saffron powder, and salt. Stir in the cubed squash. Transfer the entire mixture to a 9x13-inch baking dish.
Bake, loosely covered, for 2 1/2 hours in the preheated oven. Serve with white rice.
4 medium, thinly sliced
4 cups chopped
2 tablespoons freshly
1 medium, seeded and cubed
1 teaspoon, or to taste
3 pounds bone-in chicken pieces
0.25 teaspoon saffron powder
2.5 cups pomegranate juice