In top of double boiler, stir together rice, milk, cardamom, cinnamon and salt; cover and cook over simmering water, stirring occasionally, for 1 hour or until thickened. Remove cardamom and cinnamon. Stir in sugar and cook, covered, for 15 minutes longer. Remove from heat and stir in raisins and vanilla. Let stand for 30 minutes before serving. Makes about 6 servings.