Start by preparing the sauce. Add all the ingredients into a small mixing bowl and whisk them together. Keep it aside.
Next, heat oil in a pan. Once the oil is hot, add the garlic, green chilies, and spring onions. Saute.
Next, add the chicken pieces into the pan. Season with salt and black pepper powder. Saute for 2 minutes.
Once the chicken is 80-90% done, add the prepared sauce. Mix well.
Next, add the rice vinegar and mix.
Top the chicken with toasted cashews and mix well.
Garnish with chopped spring onions and serve hot.