Cut pork, kimchi, tofu, onion, and green onion into bite-sized pieces.
Put the pork into a pot and stir-fry over medium heat.
When the pork starts to cook, add the kimchi and stir-fry together.
Once the kimchi softens, pour in the water.
When it starts boiling, add the tofu and onion.
Season with red pepper powder, minced garlic, soy sauce, salt, and pepper.
When all ingredients are cooked, add the green onion and let it boil for a moment longer.