1. Cut ghost shapes out of waxed paper to use as templates.
2. Place templates on serving dish or cookie sheet. Use rubber spatula to mold 1/2 to 1 cup potatoes into each ghost shape.
3. Slice olives to create circular shapes to be used for eyes and mouth.
To warm Mashed Potato Ghosts, microwave on HIGH 2 to 4 minutes on microwavable plate. If using oven, place potatoes on cookie sheet and re-heat at 350°F, loosely covered with foil, 7 to 8 minutes or until heated through.