Cut the chicken breast into bite-size pieces.
Place the cashews, yogurt, and buttermilk into a food processor or blender and pulse the ingredients until they form a smooth mixture.
Place the chicken pieces into a spacious container and evenly sprinkle all the spices over them.
Pour the cashew mixture over and stir to coat the chicken pieces.
After covering the container with a lid or plastic wrap, place it in the refrigerator for at least 1 hour.
Add vegetable oil to a pan or skillet and heat over medium heat.
Add the marinated chicken to the pan and cook, occasionally stirring, until it turns golden.
After adding water to the pan, cover it with a lid.
Reduce the heat and let it cook for approximately 15-20 minutes.