In a large bowl, combine the first 8 ingredients; set aside. Hollow out tops and bottoms of rolls, leaving 3/4-in. shells (discard removed bread or save for another use)., Spread olive mixture over tops and bottoms of rolls. On roll bottoms, layer with hard salami, provolone cheese, cotto salami and mozzarella cheese. Replace tops. , Wrap tightly. Refrigerate overnight. Cut each into 6 wedges; secure with toothpicks.