In small saucepan, combine pineapple juice, lime juice, sugar and cornstarch. Cook, stirring constantly, over medium heat, until mixture is bubbly and slightly thickened. Remove from heat, stir in coconut and rum. Pour hot mixture into medium bowl. Chill in freezer 10 minutes. Serve over pie.
Makes 6 servings.
Cajun Country -- New Iberia, Louisiana