Add water to the Instant Pot.
Place chicken breasts in the Instant Pot.
Keep in mind as you add ingredients, there's no need to stir.
Mince the garlic, and add it in with the chicken.
Add the lemon juice, chili powder, salt, and black pepper.
Wash and chop or mince the peppers and onion. Add them in with the chicken.
Finally, add a can of petite diced tomatoes.
There's no need to stir or mix together ingredients. Just place the lid on the Instant Pot.
Press the Pressure Cook button and set for 1 hour.
Allow the pressure valve to naturally release.
Once the chicken is done, open up the Instant Pot and shred the chicken with 2 forks. It'll be so tender, it will easily shred right in the pot.
Finally, give the chicken a good stirring, mixing it up with all the ingredients.
Serve or enjoy in tacos, enchiladas, nachos, quesadillas, burritos, salad, soup, etc.