PLACE potatoes in large saucepan; add enough water to cover. Bring to boil; cook on medium-low heat 15 min. or until potatoes are tender.
MEANWHILE, mix cream cheese, sour cream and Parmesan; cover. Refrigerate until ready to use.
DRAIN potatoes. Cool slightly. Cut potatoes in half; cut small piece from bottom of each potato half so potato lies flat. Place on serving platter. Top each potato half with 1 tsp. cream cheese mixture. Top with bacon and chives.