01 -
Preheat a panini press, electric grill, or grill pan over medium heat.
02 -
Slice bread into thick pieces or halve a loaf of ciabatta. Optionally, remove some of the crumb from the ciabatta to create space for the filling.
03 -
Spread pizza sauce evenly over the cut sides of each bread slice. Layer mozzarella and pepperoni on the bottom half, then place the top half of the bread.
04 -
Lightly coat the exterior of the sandwich with olive oil spray.
05 -
Place the assembled sandwich onto the preheated grill or press. If using a grill pan, press the sandwich with a heavy skillet. Grill for 3–4 minutes per side until bread is golden and cheese is melted.
06 -
Remove the panini from heat and allow it to cool for 1–2 minutes. Slice and serve warm.