Mix all the ingredients mentioned under Sauce.
Add two tablespoons of the above sauce to the chicken and let it marinate while you do the rest of the steps.
Switch on the instant pot and set it to 'Saute Mode'.
When the inner pot is hot, add a teaspoon of oil(from 2 tablespoons of oil). Add cubed peppers and saute for 2 minutes.
The peppers would look slightly charred and smells nice and smokey. Remove from the pot and keep it aside.
Next to the pot add rest of the oil, when oil is hot add dry red chilli, minced ginger, minced garlic, chopped onion. Saute for a minute, until the onion has softened a bit and ginger garlic is aromatic.
Add marinated chicken to the pot. Toss well and let it saute for 1 minute.
Add the rest of the sauce, chicken stock, and pepper to the pot.
Close the lid and set the Instant pot to 'Manual/ High-Pressure Mode'. Set the timer to 4 minutes.
The timer will start when the IP comes to full pressure, it may take around 5 minutes.
When the timer is off, carefully quick release the pressure.
Stir in the cornflour slurry, sauteed peppers, roasted Cashew. Let it cook for a few seconds and the sauce will thicken.
Serve hot over rice.