Add enough water to just cover 25g of oatmeal, add 50g of tuna, then microwave for 1 minute and 30 seconds.
Prepare oatmeal, tuna, and eggs.
Beat the egg and set aside.
Add 300ml water and oatmeal to a pot and bring to a boil.
Once the oatmeal softens, add the tuna and boil for 2 more minutes.
Add the beaten egg, stirring constantly until cooked.
Season with salt and serve.