Pour the broth or water into the pressure cooker. Place defrosted or fresh breasts (separated) inside. Sprinkle the taco seasoning over the chicken and then cover with the salsa.
Pour the diced tomatoes. (If you want to make creamy cut up a block of cream cheese into smaller chunks and plop on top. Do not stir!!)
Seal the lid on the pressure cooker and set the valve to sealing. Set for 15 minutes on high pressure. When the cycle is complete, allow the pressure cooker to naturally release for 10 minutes, then do a quick release.
Shred the chicken with two forks and serve over nachos, tacos, or rice with your choice of toppings.