I was born and raised in Hawaii.
Canned sardines are HUGE!
... and canned meats too
This is how we do it:
In a large bowl,
place two scoops of hot steamed white (or brown if you must) Rice
Open and drain one (or two) cans of Sardines,
depending on how hungry you are
Top with diced Sweet White Onions (Sweet Maui Onions);
and Aloha Brand Shoyu
This is the "deluxe" version, some folks stick with
simply hot rice and sardines.
As to how to enjoy them, eat bones and all!
This is my American-Italian-Born-in-PA husband's FAVORITE lunch,
believe it or not. My Dad taught him how to make his own lunch.