Soak the seaweed in cold water, then chop it finely.
Finely chop the carrot and onion.
Heat sesame oil in a pot and sauté the seaweed and vegetables.
Add the oatmeal and sauté together.
Add water and soy sauce for soup, then bring to a boil.
Simmer on low heat, stirring until it thickens.
Season with salt to taste.