To prepare the Cuban, butter the top and bottom interior side of each baguette and place in a skillet over medium heat to brown and crisp the bread. Once browned, remove the baguettes from the skillet and begin to layer each sandwich with 1 tablespoon mustard, 4 ounces pulled pork, 2 slices pickle, 2 to 3 ounces ham and 2 slices Swiss cheese. After stacking the sandwiches, return the skillet to the stove over medium heat and warm with the oil. Add the sandwiches in batches and weigh down with a heavy skillet. Grill until crisp on the exterior, 1 to 2 minutes. Then flip and repeat the process on the second side. Once cooked on both sides, remove and repeat with the remaining sandwiches, then serve.