Boil the pasta as per package directions.
In a skillet heat oil and add ginger and garlic paste. also add onions and saute until onions are transparent.
Add tuna and spices. cook on med. heat for 5 min. or till tuna is mixed with spices,add tomato puree and cook until the mixture starts giving out oil on the side of the skillet. Now add soya sauce, hot sauce and ketchup. Add pasta and mix well... Let it sit for 5 min and ready to serve.