Preheat panini press or large grill pan or skillet.
Cut ciabatta rolls in half crosswise. Divide the pepper jelly evenly between the four rolls, spreading on top and bottom halves. Top the bottom of each roll with slices of ham, cheddar cheese and arugula. Lay the top of each roll over the fillings.
Place the sandwiches on the panini maker or pan, working in batches if necessary. Close the panini press. If using a grill pan or skillet, place a brick, washed and wrapped in foil, on top of the sandwiches to emulate a panini press.
When the bread is toasted and the cheese is melted, remove the sandwiches from the press, cut in half, and serve immediately.
Notes
Please note that I am not a medical or nutritional professional. I provide nutritional information for my recipes as a courtesy to my readers. It is calculated using the built-in recipe card calculator. While I attempt to provide information that is as accurate as possible, you should calculate the nutritional information independently before relying on it.