Place chicken on the trivet, then season with salt, black pepper, and Italian seasoning.
Close the lid; turn the knob to Sealing.
Press Manual or Pressure Cook button and adjust time to 15 minutes.
While the chicken is cooking, prepare Bruschetta. In a small bowl, mix together all Bruschetta ingredients. Let chill in refrigerator until ready to serve.
When the timer beeps, allow 5 minutes to naturally release the pressure, then remove the lid. Place mozzarella slices on top of chicken and replace the lid. Let sit 5 minutes with lid on to allow the cheese to melt slightly.
Remove to a serving plate and top with Bruschetta. Serve immediately.