Microwave the rice.
Stir-fry cabbage in tuna oil.
Once browned, add tuna and stir-fry together.
On one side, add soy sauce and tuna sauce, let simmer briefly, then mix everything together.
Add pepper and rice, stir-fry and mix well, then transfer to a bowl.
Scramble just the egg whites on low heat in a pan and place on top of the rice.
Drizzle with sesame oil.