Cut the loaf of bread in half, then cut into 4-6 even pieces.
Open each piece of bread and cover the bottom slice with cheese, pickles, pork, ham, and cheese, topping the top slice of bread with mustard.
Coat the outer sides of the bread with butter.
Place on an open skillet, indoor grill, or panini press.
Allow the bottom of the sandwich to cook until golden, before turning.
While the second side is cooking, use a second pan, or skillet lid to press down on the sandwich to flatten it together.
Once the sandwich is compressed, and both sides are golden brown, remove from heat and serve.