This delicious recipe can be prepared ahead of time. Mash the drained cooked potatoes, then mix in the cream cheese product and milk as directed. Spoon into 1.5-L casserole dish sprayed with cooking spray. Refrigerate up to 24 hours. When ready to serve, bake, uncovered, in 350°F oven 1 hour or until heated through. Top with cheddar, bacon and onions.