The Pearl Cuban Sandwich / 1 loaf cuban bread, sliced lengthwise, 1/2 stick (1/4 cup) unsalted butter, softened, 3 tablespoons yellow mustard, or to taste, 1 1/2 pounds boiled ham, sliced, 1 1/2 pounds roasted pork, sliced, 1 pound swiss cheese, sliced, 1 cup dill pickle chips, or to taste.