Cut the tofu into bite-sized pieces.
Lightly season the tofu with a little salt.
Heat some cooking oil in a pan and cook the tofu until golden brown on both sides.
Make the sauce by mixing soy sauce, red pepper powder, minced garlic, sesame oil, a little water, a bit of sugar, green onion, and sesame seeds.
Pour the sauce over the cooked tofu and simmer on low heat.
Flip the tofu occasionally so the sauce gets absorbed evenly, then serve.