Select Saute on the Instant Pot and add olive oil. Once the oil is hot, add onion and peppers. Stir about 2-3 minutes or until translucent. Add minced garlic, spices (cumin, chili powder, garlic powder), and tomato paste and cook 30 seconds - stirring constantly.
Turn Instant Pot off. Add the salt (optional), diced tomatoes and green chiles, chicken stock, beans and chicken breast. Put on the lid to "seal" and program for "Poultry" and increase time to 18 minutes for thick chicken breast or leave it at 15 minutes for smaller size.
Use Quick Release once the Instant Pot is done cooking. Add the warm water and cornmeal. While the pot keeps the soup warm, shred the chicken with forks in the pot or remove and shred (you can shred it in the mixer too!).
Serve with toppings and enjoy!
Recipe by Whisk Together at https://www.whisktogether.com/2019/01/01/instant-pot-chicken-tortilla-soup/