Fruit on the Bottom Option: Helen purees the fruit in advance, and divides it among 4 glasses. She then freezes the glasses. Once the panna cotta mixture is ready and
completely cooled to room temperature (hot liquid can shatter the glasses!), she removes the glasses from the freezer, and tops the berry puree with the panna cotta mixture. Then you simply refrigerate the panna cotta for 3 hours or more.