In a bowl, take boneless chicken pieces and add ½ tablespoon ginger & garlic paste, 1 egg white, 1 teaspoon black pepper powder, ¾ teaspoon salt, and 2 tablespoons of cornflour. Mix well and set aside for 15 minutes.
Heat cooking oil in a deep Kadai or wok for deep frying. Let the oil heat on a medium flame for 5 minutes. Drop marinated chicken pieces into the oil one piece at a time. Do not add all the pieces at once, as they will stick to each other. Fry the chicken pieces for 5 to 7 minutes on medium flame (not too hot). Remove on an absorbent paper and keep warm.
Heat 3 tablespoons of cooking oil in a saucepan or Kadai and add 1 tablespoon cumin seeds. When the seeds slightly change color add finely chopped garlic. Fry for 1 minute on slow flame and then add finely chopped onion. Fry onion just until soft and then add green chilies and curry leaves.
Now add kasoori methi, turmeric powder, coriander powder, red chili powder, and black pepper powder. Cook for 1 minute and then add whisked yogurt, soy sauce, and salt. Stir well and add fried chicken pieces.
Stir-fry the fried chicken in yogurt on medium heat for 5 minutes or until all the chicken pieces are well coated and all the juices are dry.
Turn off the flame and serve hot as a side with dal chawal or as a starter.