Cut the pork and kimchi into bite-sized pieces.
Add the pork to a pot and stir-fry.
Add the kimchi and stir-fry together.
Add minced garlic and chili powder, then stir-fry.
Pour in water and bring to a boil.
Add tofu and onion, and simmer briefly.
Season with soy sauce, salt, and pepper.
Finish by adding green onion.