In a large pot of boiling water, blanch the beef for half minutes. Transfer out, clean and drain.
Heat oil in a small pot, add green onion, bay leaves, red onion and spices. Heat over slow fire until aromatic and the green onion becomes slightly browned and wired. Transfer all the content out and leave the oil only.
Add beef in and continue frying over slow fire (take 4 minutes to 6 minutes) until the beef becomes dry and slightly browned.Transfer beef out.
Add minced garlic, minced ginger and minced pepper. Simmer with slowest fire for 15 minutes. Add beef, pepper flakes, sugar ,salt and soy sauce. Mix well and continue cooking for another 10 minutes. Cool down and transfer to clean and air-tight container.
Notes
Nutrition is calculated on each portion (2 tablespoon) of the sauce.