Prepare oatmeal and seaweed.
Crumble the seaweed into small pieces.
Pour water into a pot and bring it to a boil.
Once the water is boiling, add the oatmeal.
When the oatmeal softens, add the crumbled seaweed and stir.
Season with soy sauce and salt to taste.
Let it simmer briefly, then serve in a bowl.