Cut the pork into bite-sized pieces.
Chop the kimchi into easy-to-eat pieces.
Slice the onion, tofu, and green onion.
Add the pork to a pot and stir-fry over medium heat.
Add the kimchi to the pork and stir-fry together.
When the kimchi softens, pour in water.
When the soup boils, add the onion and tofu.
Season with minced garlic and gochugaru (Korean red pepper flakes).
Add the green onion at the end and let it simmer briefly.