Mix the red chili powder, turmeric powder, salt, coriander powder and pepper powder with 2 tablespoons of lime juice. Coat the kidney pieces evenly with this spice paste. Let this marinate for an hour.
Heat the oil in a pan and fry the chopped onions until soft. Add the ginger-garlic to it and fry for a minute. Then add the marinated kidneys with the marinade and fry for 10 more minutes. Add I more tablespoon of lime juice. Mix well. Cover and cook for 10-15 minutes. Serve hot.