Sauté Aromatics: Press the Sauté button and wait for the pot to heat up. Add the coconut oil. Once simmering, toss in the red onions and peppers, cooking for about 3 minutes until softened.
Deglaze & Season: Pour in the chicken stock, lime juice, red pepper flakes, coconut milk, and turmeric. Stir well, scraping any bits from the bottom, and let it simmer for a minute. Taste and season with salt and pepper.
Pressure Cook: Place the chicken breasts into the liquid. Secure the lid and ensure the steam vent is set to the "Sealing" position. Select Manual or Pressure Cook on High Pressure for 8 minutes.
Natural Release: Once the timer beeps, allow the Instant Pot to remain on "Keep Warm" for a 10-minute natural pressure release (NPR) before manually releasing any remaining steam.
Prep the Chicken: Carefully remove the chicken breasts and transfer them to a cutting board. Slice or shred the chicken into bite-sized pieces.
Thicken the Sauce: With the lid off, press the Sauté button again. Bring the sauce to a boil and stir in your starch slurry (arrowroot or cornstarch mixed with water).
Combine & Garnish: Once the sauce thickens, turn off the heat. Stir the chicken pieces back into the pot along with the fresh chopped cilantro. Give it one final taste for salt, pepper, or an extra squeeze of lime before serving.