Start by searing the beef in a pot over medium-high heat until browned. set aside.
In the same pot, add the garlic and sauté until golden. Add the onions, ginger, and onion leeks.
Add the spices: star anise, cinnamon, peppercorns, and five spice. Toast briefly.
Return the beef to the pot and add the beef broth, soy sauce, brown sugar, oyster sauce, bay leaves, and sibot. Season with fish sauce. Bring to a gentle boil, then lower to a simmer, cover, and cook for 1 to 2 hours, or until the beef is tender. Adjust seasoning to taste as it cooks.
Pour in the cornstarch slurry while stirring until the soup thickens to your liking.
To make the chili garlic oil, blend the garlic and chilies. Transfer to a pan with oil and cook gently over low heat until garlic crispy. Stir in the oyster sauce and season with salt and pepper.
Serve with garlic rice, chili garlic oil, crispy garlic, green onions and egg noodles if you want mami style. Enjoy!
