Bring to a boil in a medium saucepan, stirring until the sugar is dissolved:
Boil the syrup for 5 minutes, then add:
Simmer the berries in the syrup very gently, uncovered, without stirring, until the berries are translucent, about 5 minutes. Skim off any foam. If desired, add:
Pour the berries into a serving dish. Chill until firm.