Cut the tofu into bite-sized pieces.
Mix soy sauce, red pepper powder, minced garlic, sugar, and sesame oil to make the sauce.
Place the tofu in a microwave-safe container and evenly pour the sauce over it.
Cover with a lid or plastic wrap and microwave for 3-4 minutes.
Finish by sprinkling chopped green onion and sesame seeds over the braised tofu.