Soak dried seaweed in cold water.
Drain oil from canned tuna using a strainer.
Heat a pot, add sesame oil, and stir-fry the soaked seaweed.
Add tuna and stir-fry together.
Add rice and stir-fry for 1-2 minutes.
Pour water and simmer over medium-low heat.
Stir occasionally and cook until the porridge thickens.
Season to taste and serve in a bowl.