Cut the soft tofu into bite-sized pieces.
Slice the green onion and spicy chili pepper.
Add cooking oil to a pan and sauté the green onion until fragrant.
Place the tofu in the pan, then add soy sauce, water, and sugar.
Add the spicy chili pepper and braise on medium heat for 5 minutes.
Transfer to a plate and drizzle with sesame oil and sprinkle with sesame seeds.