Prepare oatmeal, eggs, tuna, and onion.
Finely chop the onion.
Pour water into a pot and bring to a boil.
Once boiling, add the oatmeal and chopped onion.
Simmer on low heat for 3-4 minutes.
Add tuna (with oil removed) and mix well.
Beat the eggs and slowly pour them in while stirring.
Season with salt and pepper to taste.
Turn off the heat and transfer to a bowl once the desired consistency is reached.