1. Heat oil in a large pot over medium-high heat. Add beef and sear until browned on all sides. Remove and set aside.
2. In the same pot, sauté onions until softened. Add garlic and ginger; cook for 1 minute until fragrant.
3. Pour in beef broth, soy sauce, oyster sauce, brown sugar, and sesame oil. Stir and scrape up browned bits.
4. Return beef to the pot. Bring to a boil, then reduce heat to low. Cover and simmer for 1.5–2 hours until fork-tender.
5. Remove beef, shred using two forks, then return to the broth.
6. Add ramen noodles and cook for 3–4 minutes until softened.
7. Serve hot with toppings of choice.
