Ingredients :
For the Soup Base :

1 lb beef sirloin or flank steak, thinly sliced
1 tablespoon soy sauce
1 tablespoon oyster sauce
1 tablespoon sesame oil
1 medium onion, sliced
2 cloves garlic, minced
1-inch piece ginger, grated
4 cups beef broth
1 medium cabbage, shredded
2 medium carrots, thinly sliced
1 teaspoon ground black pepper
1/2 teaspoon crushed red pepper flakes (optional, for heat)
Salt, to taste
For Garnish :

Fresh cilantro or green onions, chopped
Lime wedges (optional, for a fresh burst of flavor)
Instructions :

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