Stir-fry the shredded cabbage in a pan with olive oil.
When the cabbage softens and becomes translucent, add drained tuna and chili peppers, and continue stir-frying.
Once cooked through, add a spoonful of oyster sauce, make a well in the center, and cook the egg in the middle.
Optionally, place a slice of cheese over the egg and let it melt. Finish by drizzling with sesame oil.