Hi mate,
I know the feeling but have come across a good way to kill the taste -
Get yourself a can of Big soup say chicken and potatoe - wash the tuna in a sieve and add it to the soup - cook the soup up and hey presto you have a delicious high protein soup and you dont even taste the tuna
Give it a go and let me know how u get on
p.s make sure the soup is thick with plenty of veg,potatoes etc for max taste :P