Heat kadai,add oil and once oil heated add Jeera curry leaves and chopped onion.

Saute the onion till it turns light brown. Then add chopped tomato. Saute swell till tomota become mushy

Then add ginger garlic paste, saute well to remove it's raw smell.

Add curry chilli powder and salt. Then add little amount water. Let it cook in flame for a minute

Add washed crab into the gravy cook it in hight flame for a minute then turn it to low flame