Cover potatoes with lightly salted water in 4-quart saucepan. Bring to a boil over high heat. Reduce heat to low and simmer 15 minutes or until potatoes are tender; drain and let cool. Peel potatoes and cut into 1/4-inch slices.
Melt Spread in 3-quart saucepan over medium-high heat and cook onion 3 minutes or until onion is tender. Add potatoes, Sauce, chives and parsley.
Arrange potato mixture in 2-quart baking dish. Bake 20 minutes or until potatoes are golden. Sprinkle with cheese and bake 5 minutes or until cheese is melted.