Wash the hijiki seaweed thoroughly and blanch it in boiling water.
Briefly blanch the tofu in boiling water and remove excess moisture.
Mash the tofu into bite-sized pieces.
Add the hijiki, tofu, and chopped vegetables (such as carrots and green onions) to a bowl.
Add soy sauce, sesame oil, salt, and sesame seeds, then mix well.
Transfer to a plate and serve.