Start preparing by cooking rice and boiled egg (optional), as cooking the beef literally takes less than 10 minutes.
Heat up 1 tbsp oil in a pan over medium-high heat and sauté onions until tender.
Add sliced beef and cook until the beef is no longer pink.
Add the sauce and water, then lower the heat and simmer for ~5 mins.
Serve beef on top of steamed rice, then garnish with scallions, sesame seeds and egg. Enjoy!
