Cut the cabbage and enoki mushrooms into bite-sized pieces.
Remove excess water from the tofu and dice it into cubes.
Heat cooking oil in a pan and cook the tofu until golden brown.
Add the cabbage and enoki mushrooms, and stir-fry together.
Add the tuna and mix well.
Season with soy sauce, salt, and pepper.
Serve the stir-fried mixture over rice to finish.