1/3 cup sugar
1/3 cup white vinegar
1/3 cup water
2 teaspoons cornstarch, dissolved in 2 teaspoons of water
1/3 cup pineapple preserves

Bring sugar, water, and vinegar to a boil. Combine it with the cornstarch and cook on a low flame for 5 minutes or until thickened. Stir in the preserves, and simmer for a few more minutes. Serve warm. May be refigerated 24 hours in advance.