Cook rice in enough water with cinnamon sticks, cardamomcloves so that it will have a sweet aroma. You can use four each. When rice is half cooked add the stock (water) you got while cooking tuna. Remove the rice when it is 80 percent cooked. Strain it. :- In any case, do not overcook the rice.
Saute ginger, garlic, green chilly in oil and then add chopped onion. When it is done almost, add tomatoes and cook well until almost dry. Alternatively for NO OIL recipe you can mix items 3-7 and cook well in a non stick pan. The base becomes cooked instead of sauteed.
Mix the tuna with the sauteed onion -tomatoes and heat it until it becomes dry. Finally add the rice.
Garnish with Coriander leaves. Cook for 2 minutes.
If tuna is not available you can use any local fish:1 Kg for 3 cups of rice would suffice. No need to pressure cook if you are using fish other than tuna. adding the spice helps to reduce the mushy smell of fish while cooking.