1Preheat your panini press or a grill pan over medium heat.
Slice the ciabatta rolls in half horizontally.
Spread 1 tablespoon of pesto on the inside of each ciabatta roll half.
Layer 2 slices of mortadella, 2 slices of ham, and 2 slices of salami on the bottom half of each roll.
Place a slice of provolone cheese on top of the meats.
Add 2 slices of tomato on top of the cheese.
Close the sandwich with the top half of the ciabatta roll.
Place the sandwiches on the preheated panini press or grill pan.
Grill the panini for about 5-7 minutes, or until the bread is golden and the cheese is melted.
Remove from the heat, slice each panini in half, and serve warm.