Cut the pork neck into bite-sized pieces.
Slice the onion, green onion, and garlic.
Make a marinade using soy sauce, sugar, minced garlic, sesame oil, and black pepper.
Add the marinade to the pork neck and mix well. Let it marinate for 30 minutes.
Heat oil in a pan and grill the marinated pork neck.
Turn occasionally and cook the meat until it is done.
Serve with vegetables as desired.