Cut the pork leg meat into bite-sized pieces.
Prepare and slice the onion and green onion.
Make the seasoning sauce with soy sauce, sugar, minced garlic, sesame oil, and pepper.
Mix the meat, seasoning sauce, and vegetables together and marinate for 20 minutes.
Heat some cooking oil in a pan and stir-fry the meat over high heat.
When the meat is cooked through and the sauce thickens, it's done.