Combine prunes, saffron, and 1 1/2 cups water in a large bowl; let stand 1 hour.
Drain, reserving liquid, and set aside.
Sprinkle chicken with salt and pepper; cook in hot oil in a large skillet about 5 minutes on each side.
Remove chicken, reserving drippings in skillet; keep chicken warm.
Saut onion in reserved drippings 5 minutes; add prunes, reserved prune liquid, ginger, and cinnamon stick. Bring to a boil over medium-high heat. Reduce heat, and simmer 5 minutes or until mixture is reduced to 1 cup.
Add chicken; cook 5 minutes or until chicken is done.