Add the pureed strawberries to a heavy saucepan add the zest and 1/2 cup water. Bring to a boil, reduce heat and simmer for 5 minutes. Remove from heat and set aside to cool.

In the meanwhile place the sugar and 6 tablespoons of water in another heavy sauce pan. Bring the mixture to a boil and cook until the syrup reaches 260 degrees F on a candy thermometer. Remove from the heat and cool for 2 to 3 minutes. Add the berries to the syrup place back on the heat, bring to a boil and let boil for 8 minutes. Remove from and it is ready to serve.