Pesto Chicken Caprese Sandwich

Step 1
Preheat the oven to 375 degrees C (190 degrees C).

Step 2
Thinly slice chicken breasts in half and season with Italian seasoning and salt. Place chicken on a rimmed baking sheet.

Step 3
Bake in the preheated oven until chicken is no longer pink in the center and the juices run clear, about 20 minutes. An instant-read thermometer inserted into the center should read at least 165 degrees F (74 degrees C).

Step 4
Cut heirloom tomato and mozzarella cheese into four 1/3-inch thick slices. Set out tomato slices on a baking sheet and top with mozzarella slices. Add to oven and bake for the last 10 minutes with the chicken. Remove chicken from oven.

Step 5
Turn oven to broil and broil tomatoes and cheese, until cheese has melted, 2 to 3 minutes. If desired, add ciabatta buns and toast under the broiler until browned, 1 to 2 minutes.

Step 6
To assemble the sandwiches, place a chicken filet onto the ciabatta bun, top with tomato and melted mozzarella, and 1 tablespoon pesto.