Beat the eggs and set aside.
Finely chop the onion.
Drain oil from the canned tuna.
Heat sesame oil in a pot and sauté the onion.
When the onion becomes translucent, add cooked rice and tuna, and stir-fry.
Add water or broth and bring to a boil.
When the porridge is boiling, pour in the beaten eggs and stir until cooked.
Season with salt to taste.
Turn off the heat and serve in a bowl.