Meanwhile, make Raspberry Sauce: In 1-quart saucepan, stir together 2 tablespoons sugar, the cornstarch and water. Stir in 1/2 cup of the raspberries. Heat to boiling, stirring frequently. Reduce heat to low. Cook 3 to 5 minutes, stirring frequently, until slightly thickened. Cool 10 minutes. Stir in remaining 1 cup raspberries. Cover; refrigerate at least 1 hour until chilled.