Wash, core and stem the apples, but don't peel them. Stand them in a buttered mold and stuff them with 2/3 cup of the brown sugar, the raisins and the orange peel. fill the tops of the core cavities with butter and sprinkle the remaining sugar over the tops. Place the mold in the slow cooker and pour the hot water into the cooker. Sprinkle the orange juice concentrate over the apples. Cover the cooker and cook on Low for 3 to 5 hours, or until the apples are tender. makes 6 servings