Place potatoes in large saucepan; add water to cover. Bring to a boil. Reduce heat and cover and simmer 10 minutes. Add broccoli and onion. Return to a boil; reduce heat and cover and simmer 10-12 minutes until vegetables are tender. Drain. In a large bowl with electric mixer, combine well drained vegetables and all remaining ingredients until smooth. 5 servings ½ c 70 calories