For the lamb: Heat the oil in an enameled laminated cast-iron pot over medium heat, and sauté the lamb and onions until lightly golden (about 5 minutes). Add the salt, pepper, turmeric, cinnamon, cumin, cardamom, and sauté for 1 minute, add the tomato paste, and saffron rose water, and sauté for another 10 to 15 minutes and all juices have been absorbed.