Panini Under a Brick

Name: Panini Under a Brick
Ingredients: 4 par-baked ciabatta rolls; 1 pound left-over roast pork; 1/2 pound smoked ham or Canadian bacon; 4 slices smoked provolone cheese; Olive salad (recipe to follow); 2/3 cup chopped green olives; 1 teaspoon Sambal Oelek; 2 tablespoons, chopped dill pickles; 1 rib celery, chopped; 1 cup cabbage, sliced thin then roughly chopped; 1 heaping tablespoon finely minced onion of your choice; 2 tablespoons mayonnaise; 1 teaspoon Dijon mustard; 2 tablespoons chopped parsley