Sweet Potato Salad

In a saucepan cover potatoes with salted cold water. Bring to a boil, reduce heat and simmer, covered, until just tender, about 15 to 20 minutes. Drain potatoes well. Peel potatoes while warm and then allow to cool completely before cutting into 3/4 inch chunks and place in large bowl. Add the apples, pineapple and raisins; set aside. In a small bowl, whisk together remaining ingredients. Add to potato mixture and toss gently until well combined. Chill for a minimum of 1 hour before serving.