Soak the oatmeal in water for 5 minutes.
Add a little oil from the tuna can to a pan and sauté the kimchi over low heat.
Add the soaked oatmeal and water to the pan and simmer over low heat.
Add chopped kimchi and tuna meat, then cook for 5 more minutes.
When the porridge thickens to your desired consistency, add cheese on top and cover with a lid to melt the cheese.
Season with salt and pepper to taste.