Step 1
Spread the mayonnaise on the bottom half of the roll. Top with the pork, ham, cheese, and pickle chips. Spread the mustard on the top half of the roll, then close the sandwich.
Step 2
To a large skillet over medium-high heat, add the oil. When hot and shimmering, add the sandwich, weighing it down with a cast-iron skillet, and cook, turning once, until the roll is golden brown and the cheese is melted, 8–10 minutes. Cut in half and serve hot.