Mix together a little chilly powder, a little of turmeric powder and salt and apply it to the fish.
Fry it lightly and keep aside.
Grind together tomatoes, onions, chilly powder, turmeric powder and coriander powder in a mixer grinder.
Heat oil in a pan.
:- Use the oil used to fry the tuna. It`ll enhance the taste.
Add garlic, ginger and curry leaves.
Add the ground paste.
Add green chillies, tamarind pulp and salt.
Add a cup of water too.
When it comes to a boil, add the fried tuna fish pieces.
Allow it to boil for 4-5 minutes.
:- Adjust the level of salt and sourness.
Cook on a low flame for 15 minutes.
:- Serve with rice along with moru kaachiyathu or even with chappathis, puttu, vellayappam etc.