Prepare oatmeal, tuna, eggs, and onion.
Finely chop the onion.
Pour water into a pot and bring to a boil.
Add oatmeal and onion to the boiling water and stir.
Once the oatmeal softens, add the tuna and mix well.
Beat the eggs and add them in, stirring everything until cooked.
Season with salt and pepper to taste.