Take tuna fish in a bowl, into it add turmeric, red chilli powder, salt and lemon juice.

Saute the tuna fish on a pan. Heat oil in a kadhai, add mustard, cumin seeds and methi seeds.

Add curry leaves, green chilliies, onions, tomatoes and ginger garlic paste.

Into it add turmeric, red chilli powder and coriander powder.

Saute the masala, add water and add the sauted fishes into it.

Cook the fish. Tasty fried tuna fish curry is ready to be served.