In a heavy-bottomed saucepan, combine cornstarch and sugar.
Add juice and whisk until
Place saucepan on medium heat and bring to a slow boil, whisking continuously.
for about 2 minutes, until thickened and glossy.
Remove from heat. Pour into individual serving dishes.
Refrigerate until completely chilled and set up.
Serve cold. Cover and refrigerate leftovers.
VARIATION: Orange juice may be substituted. Use freshly squeezed juice for best results.