Here is a recipe for eating canned tuna in oil (that I have been playing around with....)
Canned Tuna (in Oil) Frittata
Crack open a can of chunk tuna in oil (just enough to pour the oil out). You will need about 1/4pound of canned tuna and oil for each person being served - so size your can accordingly (1 lbs can would feed four - but you will need a big pan for that sized Frittata). I have mostly been making Frittatas with 1/4 pound Tuna cans.
Heat a fry pan and then pour the oil from the can into the pan and spread it across the bottom - in my experiments, the oil seems to be just the right amount.
Take the oil to medium heat and then add 1/4 of a medium sized, finely diced onion per person - fry the onion until starting to brown.
Remove the remaining can lid and add the chunks of tuna to the pan - spread the tuna around and smash the chunks up to about 1/2" size. Fry the onions and tuna until the chunks start to take on a little browning.
Beat some fresh eggs (two per person being fed) - crack some black pepper and sprinkle some grated cheese of your choice into the eggs.
Pour the eggs into the pan - fully covering the tuna chunks - sprinkle some more cheese onto the top of the Frittata as it starts to thicken up.
Turn down the pan to low and put a lid on it.
When the centre top of the Frittata has just firmed up, it is ready to serve. You can accompany the Frittata with any of the normal breakfast foods (like hashbrown, tomatoes, baked beans, fried slices of spam bacon or corn beef etc).
The above can be made with 100% shelf stable foods if you use Ovaeasy egg crystals, canned bega cheese and dried onion flakes (reconstituted ahead of preparation). The sides can be canned baked beans and hashbrown made from Augason Farm potato shreds.