Finely chop the cabbage.
Mince the onion and carrot.
Heat cooking oil in a pan and stir-fry the onion and carrot.
Add the cabbage and stir-fry, seasoning with salt.
Drain the oil from the canned tuna and add the tuna to the pan.
Add rice and stir-fry thoroughly to mix with all ingredients.
Season with soy sauce and pepper to taste.
Serve the finished fried rice in a bowl.