Method
1. Season both sides of the chicken with kosher salt and black pepper
2. Pre-heat the inner pot - Sauté, Normal
3. Then add extra virgin olive oil to the inner pot
4. Once hot and shimmering, add half the chicken
5. Sear both sides for 2 to 3 minutes each, just until brown (the chicken does not need to be cooked through
6. Remove to a plate and set aside
7. Add the second half of the chicken
8. Sear each side for 2 to 3 minutes each
9. Remove to the same plate
10. With the Instant Pot still on sauté, add the remaining olive oil
11. Add the onion, garlic, chili powder, and remaining kosher salt
12. Let cook 3 minutes, until the onion beings to soften
13. Turn the Instant Pot off
14. Stir in the chipotle peppers, tomatoes, and reserved chicken
15. Arrange the chicken pieces in a single layer
16. Pour the lime juice over the top
17. Close and lock the lid and turn the steam release handle to Sealing
18. Pressure cook, High, 8 min, then quick-release the pressure
19. Once you can open the lid, turn the Instant Pot off
20. Then remove the chicken to a large bowl or plate
21. Pre-heat inner pot - Sauté, Normal
22. Bring the cooking liquid to a simmer
23. Let simmer for 5 to 10 minutes, stirring occasionally, until the liquid reduces by about half
24. Meanwhile, shred the chicken with two forks (or, once it is cool enough, your fingers)
25. Once the liquid is reduced, turn the instant pot off, return the chicken into the instant pot, and then stir the chicken to coat in the sauce
26. Add avocado, low-fat greek yogurt, lime juice and kosher salt to a clean food processor bowl
27. Blend until smooth
28. Taste and add additional salt or lime juice as desired
29. To serve: fill the shells with the chicken, drizzle with avocado sauce, and add any desired toppings