Onion Tuna Tofu Stir-fry

Prepare onion, tofu, and tuna by dicing them into cubes.

Heat cooking oil in a pan and sauté the onion.

When the onion turns translucent, add the tuna and stir-fry together.

Add the tofu and mix evenly.

Season with soy sauce and pepper.

Transfer the finished ingredients to a dish.