How to Make It
In a blender, combine the pomegranate juice, vinegar, agave nectar, mustard and lime zest. With the machine on, add the oil in a thin stream and blend until emulsified. Season the dressing with salt and pepper.
Using a sharp knife, peel the grapefruit and oranges, removing all of the bitter white pith. Working over a bowl, cut in between the membranes to release the sections. Add the jicama, watercress and pomegranate seeds to the bowl. Add the dressing, toss gently and serve right away.