Heat enough oil for deep-frying in a kadhai or deep heavy-based pan to 180'C / 350'F, or until a cube of bread browns in 30 seconds.
Working in batches, add the okra to the hot oil and deep-fry for 2-3 minutes, or until crisp. Remove with a slotted spoon and drain on kitchen paper (paper towels).
Put the coriander, amchoor, chilli powder and turmeric in a small bowl, add 3 tablespoons water and mix together.
Heat the ghee in a heavy-based pan over medium-low heat, add the gram flour, and stir-fry for about 1 minute, or until it is fragrant. Add the deep-fried okra and the ground spices mixture and stir-fry for a few seconds.
Season with salt and stir-fry for about 5 minutes, or until the gram flour coats the okra. Sprinkle over the ground pepper, cardamom and nutmeg, then remove from the heat and adjust the seasoning, if necessary.