Combine oatmeal, eggs, drained tuna, seaweed, and water, cook in the microwave, then finish by seasoning with soy sauce and sesame oil.
Finely chop the oatmeal, onion, and green onion.
Beat the eggs and set aside.
Heat sesame oil in a pan and sauté the onion and green onion.
Add the tuna and stir-fry together.
Add the oatmeal and water, and simmer on low heat.
Pour in the beaten eggs and stir as it cooks.
Season with salt and pepper to taste.
Serve in a bowl.