2) For the dressing: Combine the dressing ingredients in a blender and puree until smooth. Season with salt and pepper. Once potatoes are cool toss with dressing and set aside on salad platter.
3) For the salad: Combine salad ingredients in a large mixing bowl and dress with lemon juice, olive oil, to taste, a splash of soy sauce, and a little salt and pepper. Toss well and place on top of the sweet potatoes to serve as a complete salad.