Slice pork leg thinly.
Julienne onion, green onion, and carrot.
Prepare the sauce by mixing chili paste, soy sauce, sugar, minced garlic, and red pepper flakes.
Add the sauce to the pork and mix well. Marinate for 10 minutes.
Heat cooking oil in a pan.
Add the marinated pork and vegetables to the pan and stir-fry.
Cook over medium heat until the pork is fully cooked.
Finish by sprinkling sesame seeds.