Frozen Pumpkin Mousse

Recipe Instructions In a heavy saucepan, boil water and sugar until syrup reaches soft ball stage (238F on a candy thermometer). While syrup is boiling, using an electric mixer, beat egg whites with a pinch of cream of tartar until stiff peaks form. With mixer running, pour hot sugar syrup into egg whites in a steady, thin stream. Continue beating until mixture is entirely cool (this may take more than 10 minutes). Fold in pumpkin and pie spice. Beat rum into whipped cream and fold into pumpkin mixture. Turn mousse into a soufflee dish that has been fitted with a paper collar; freeze at least 4 hours. Remove mousse from freezer and place in refrigerator about 30 minutes before serving. Spoon into dessert dishes and serve with gingersnap cookies. From "The Hay Day Cookbook," by Sallie Y. Williams; Atheneum