How to Make It
In a small saucepan, combine the water, sugar and citrus zests. Scrape the seeds from the vanilla bean; add the seeds and bean to the pan. Simmer over moderate heat for 5 minutes. Cool to room temperature, then strain the syrup into a blender. Add the raspberries and puree until smooth. Strain the puree, then stir in the orange and lemon juices.