To make ahead, place unbaked olive-cheese balls on ungreased cookie sheet. Freeze at least 2 hours until firm. Place balls in plastic freezer bags. Seal, label and freeze up to 3 months. Heat oven to 400ºF. Place cheese balls 2 inches apart on ungreased cookie sheet. Bake about 20 minutes or until hot.
Add flavor pizzazz by using shredded pizza- or herb-flavored, pepper Jack or aged Swiss cheese instead of the Cheddar.