In a large skillet, heat the sesame oil over medium heat. Add the ground pork and cook until browned, breaking it apart with a spatula, about 5-7 minutes.
Add the diced onion, minced garlic, and grated ginger to the skillet. Sauté for another 3-4 minutes until the onion is translucent and fragrant.
Stir in the coleslaw mix, soy sauce, rice vinegar, and sriracha (if using). Cook for an additional 5-7 minutes, stirring occasionally, until the cabbage is tender.
Remove from heat and stir in the sliced green onions.
Serve hot, garnished with sesame seeds.