Wash the cabbage thoroughly and slice it thinly.
Crack the eggs into a bowl, add a pinch of salt, and mix well.
Heat cooking oil in a pan, then stir-fry the cabbage for 2–3 minutes.
Drain the oil from the tuna and add it to the pan with the cabbage. Stir-fry together.
Pour in the egg mixture and scramble it while stir-frying.
Add rice and mix all the ingredients well while stir-frying.
Season with soy sauce or salt to taste.
Transfer to a bowl and serve.