In a large bowl, add pork, green onion, garlic, ginger, chili paste, red pepper flakes, soy sauce, rice vinegar, sesame oil, sugar, and pepper.
Cover and chill for 30 minutes - 1 hour.
In a large skillet or wok, over medium-high heat, add oil. Heat until sizzling hot.
In batches, add pork (do not overcrowd the pan). Cook about 3-5 minutes or until slightly crispy. Remove from pan and set in a bowl to keep warm. Continue with remaining pork.
Top with sesame seeds.
Serve with a side of rice and vegetables.
