Turn the Instant Pot on [SAUTE] mode and set it for 10 minutes (this should give you enough time to saute the onions). Wait until the screen displays "hot". Add olive oil and onion into the pot. Stir occasionally for 3 minutes until the onion is soft. Then, press the [CANCEL] button.
Add garlic, chicken broth, and stir. Then, add 1 can of diced tomatoes, 1 can of diced green chilies, 1 can of black beans, 1-2 chipotle peppers in adobo sauce (finely diced), and 1 cup frozen corn kernels. Place the chicken breast on top of the ingredients. Generously season the chicken with salt and pepper. Add ground cumin and ground chili pepper on top of the chicken.
Close the lid. Make sure the knob on the lid is turned to the "sealing" position. Then, press [PRESSURE COOK] (or "manual" for older models) and set it to 11 minutes. When it is done, let it naturally pressure release for 5 minutes. **Cooking time and tips for chicken thighs or frozen chicken breasts below**
Shred chicken with two forks (either right in the pot, or on a cutting board)
Add lime juice, salt and pepper to taste.
Topping Ideas: tortillas chips, shredded cheddar cheese, sour cream, avocado, lime wedges, cilantro