Pour the duck fat in a hot pan and add to it the finely chopped onions. Let it cook on low fire until translucent.
Meanwhile, cut the duck filets into big chunks and add it to the frying onions, and let it cook for ten minutes with the cinnamon, saffron, curcuma and salt.
Add the Prunes and stir from time to time during five minutes. This dish should be served hot.