Make sure the stainless steel pot is in your Instant Pot (to know why I always mention this step, check out my Instant Pot Guide for Beginners). Press "saute" setting and wait 2 minutes. Add olive oil to pot. Add garlic, chopped onion, and pepper. Saute until the onion is almost translucent.

Mix spices in a small bowl and rub half of the mixture all over your chicken breast. My chicken breast was large and thick so I cut it lengthwise in half to make two. Move the sauteed veggies with a wooden spoon to make space for the chicken. Add chicken and sear on each side for 2 minutes. Remove chicken to a plate (it won't be cooked through yet).

Add 1 cup of water and scrape any bits from the bottom of the pot. Add remaining water and 2 cups of chicken broth to pot. Add remaining seasoning and stir. Place chicken in liquid. 

Place lid on your Instant Pot, switch the valve to sealing position. Press manual setting and set timer to 15 minutes. Make sure the IP is set to cook on HIGH pressure. The Instant Pot will take 10 to 12 minutes to come to pressure. When the timer is done, wait a few minutes and switch the valve to venting position to release the pressure. Open the lid carefully away from your face.

Remove the chicken from pot onto a plate. Use two forks to shred chicken. Return to the soup and stir well. Serve with shredded cheddar or Pepper Jack cheese, chopped cilantro or parsley, diced avocados, etc.