Cut the zucchini into half-moon slices.
Julienne the onion and carrot.
Drain the oil from the canned tuna using a strainer.
Heat cooking oil in a pan and stir-fry the onion and carrot.
Add the zucchini and season with salt, then stir-fry.
Add the tuna, soy sauce, minced garlic, and pepper, and stir-fry together.
Place the stir-fried ingredients on top of rice.
Top with a fried egg and roasted seaweed flakes according to your preference to finish.