Clean the crab really well , separate the legs and the body portion of the crab. It might have more sand on it . So wash it well. Heat a idli steamer with water. I used Blue variety of Nandu / Crab.
Steam cook the cleaned crab for 7 mins. Switch off and allow it to cool down. The Nandu / Crab would have turned pink , Which indicated the crab is cooked perfectly.
Use the stick of the mortar and pestle , break open the shell and remove the cooked crab meat and set it aside.
In a pan add in 1 tsp of oil ,once its hot add ¼t h cup of finely chopped onions , Saute for 1 minute in low flame.
Neat add the chopped tomatoes , Saute for 30 secs no need to cook the onions and tomatoes fully. Next add the curry leave sand sliced green chilli. Saute for few secs .
And then add ¼ tsp pepper powder , ¼ tsp Turmeric powder and the required Salt. Saute for a min and then switch off the flame. Transfer everything to a mixing bowl.
To this add in the cooked crab meat and mix well and then break open 2 eggs. Beat with a whisk. Add more Salt if required.
Next add 2 tbsp of Water and Whisk everything together for a minute .
Heat a dosa tawa , Once its hot pour a ladle full of the prepared egg mixture and spread lightly , Drizzle oil over the edges. Cook in a medium flame.
Slowly the edges will start to brown. it may take 40 secs to 1 min for the omelette to get cooked . Flip and cook the other sides for another few secs and the omelette is now ready to be served.