Discard the top and bottom ½ inch and cut the bhindi into quarters lengthwise. If the bhindi is long, then cut it in half horizontally.
Slice off the seeds.
Add bhindi, salt, red chili powder, turmeric powder, garam masala powder, roasted cumin powder, and chaat masala powder to a large mixing bowl and mix well.
Let it rest for 10-12 minutes. Bhindi will leave the water at this time.
Now add besan and cornstarch to the bowl and mix lightly.
Add 1-2 teaspoons of water if the besan is not sticking to the bhindi, and mix well.