In a heavy-bottomed medium saucepan over medium-high heat, bring cranberries, brown sugar, raisins, ginger, water & vinegar to a boil, stirring often to dissolve sugar. Reduce heat to medium-low and simmer, uncovered stirring often, until all cranberries burst and juices thicken lightly, about 5 minutes. Remove from heat and stir in rum. Cool completely.
Serves 12.
