Thinly shred the cabbage.
Crack and beat the eggs in a bowl.
Heat cooking oil in a pan and sauté the cabbage.
When the cabbage softens, add the tuna and stir-fry together.
Pour the beaten eggs into the pan and scramble them.
Place rice in a bowl and top with the sautéed cabbage, tuna, and egg.
Season with soy sauce or salt to taste.