Preheat a panini grill or a george foreman grill and lightly grease it with nonstick spray (or preheat an oven to 350 degrees)
Slice the bread open. Spread mustard on both sides.
Place cheese and pickles on the bread. Layer with ham.
Close the sandwich, place on a panini grill or george foreman grill and press down. Cook until the cheese is melted and bread is crispy. (if using an oven place the sandwich on a baking sheet and cook until the cheese is melted.)