Finely chop the tuna and vegetables.
Heat sesame oil in a pot and stir-fry the vegetables.
Add the tuna and stir-fry together.
Add rice and stir-fry for a little while longer.
Pour in water and soy sauce for soup, then bring to a boil.
Stir over medium heat until it becomes porridge.
Season with salt to taste.
Serve in a bowl and finish with sesame seeds and seaweed flakes.