Drain the oil from the canned tuna and set aside.
Crack the eggs and beat them well.
Rinse the cooked rice in a sieve under running water.
Add water and rice to a pot and bring to a boil.
When the porridge starts to thicken, add the tuna and stir well.
Slowly pour in the beaten eggs while stirring gently.
Season with salt to taste.
Serve in a bowl and top with chopped green onions.