Heat the cooking oil in a wok.
When the oil becomes hot, put-in the beef. Cook for 4 to 5 minutes.
Add the garlic. Stir and cook for 2 minutes.
Pour-in soy sauce and oyster sauce. Stir.
Add the water and beef cube. Let boil and simmer for 30 minutes.
Put-in the broccoli. Cook for 2 minutes.
Pour-in the water with cornstarch.
Add sugar, salt, and pepper. Stir.
Transfer to a serving plate. Serve.
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