Heat your griddle, sandwich press, or a heavy frying pan (cast iron is best), on medium high heat.
Cut the loaf of bread in half, cross-wise, then cut each half in half. Then cut each piece lengthwise. You should have 8 pieces of bread to make 4 large sandwiches.
Spread Mustard on the cut side of each of the pieces of bread.
On the four bottom pieces of bread make a layer of cheese, then a layer of pickles, then pork slices, then ham. Top with another layer of cheese.
Put the remaining two pieces of Bread on top
Brush the outside of the sandwiches with the melted butter, both top and bottom
Cook on your griddle, sandwich press, or in the frying pan. Put another heavy pot on top to weigh the sandwiches down. (I put a can of tomatoes in the top pot for the weight.) Cook until bread is toasted and cheese is melted. Flip halfway through. If you are using an electric sandwich griddle, you won't have to flip these.
Serve hot and melty!