In a large skillet, bring 1" of water to a boil. Add yams. Cover and simmer for 20 minutes or until they are tender. Drain. In a small bowl, mix orange peel, orange juice, brown sugar, salt, cinnamon and allspice. Pour over yams in skillet. Cook and stir until bubbly. Simmer, uncovered, for 5 minutes, spooning sauce over potatoes occasionally to make a glaze. Per serving: 135 calories, 0 fat.