Wash minari thoroughly and cut into 4 cm lengths.
Drain the tofu and cut into bite-sized pieces.
Place the tuna in a strainer to remove excess oil.
Blanch the tofu in boiling water for 1 minute, then cool on a strainer.
Put minari, tofu, and tuna into a bowl.
Add soy sauce, minced garlic, sesame oil, and ground sesame seeds, and mix gently.