Wash and clean okra. Pat dry each okra with a kitchen paper towel. This step is important. Do not skip this step.
Chop the okra into 1 inch size pieces. Add mustard oil and coat the okra pieces well.
In a separate mixing bowl, mix rice flour, hing, curry powder, Kashmiri chilli powder, turmeric powder, cayenne and salt as per taste.
Coat the okra pieces with this mixture in a bowl. Mix well so that the okra is coated well on all sides. Keep it aside at least for an hour.
Heat enough oil in a fry pan to shallow fry the vegetable. Once the oil is hot, add the curry leaves, fry for a few seconds. Next add the marinaded okra and fry. Cook on medium heat till the okra is completely cooked.
Serve the hot and crispy okra immediately. You can drizzle lemon juice to make it a little tangy.