Chicken and Peperonata Panini

Deselect All

2 tablespoons olive oil, plus more for brushing

1 red onion, halved and sliced thin 

1 orange bell pepper, sliced into thin strips 

1 red bell pepper, sliced into thin strips 

1/4 teaspoon dried oregano 

Kosher salt 

2 tablespoons capers, drained and rinsed 

2 tablespoons balsamic vinegar 

2 tablespoons torn fresh basil

Four 3 1/2-inch square ciabatta rolls

8 slices provolone 

4 cooked chicken cutlets, sliced