Wash the pork shoulder thoroughly and prepare it.
Cut the onion, green onion, garlic, and ginger into appropriate sizes.
Fill a pot generously with water and bring it to a boil.
Once boiling, add the pork shoulder, onion, green onion, garlic, ginger, pepper, and salt.
Simmer over medium-low heat for 40 to 50 minutes.
When the pork is cooked, take it out and cut it into bite-sized pieces.
Serve with ssamjang and vegetables as desired.