Mengocok Daging Sapi

Bahan-bahan (4 porsi)

• 1.5 lbs . (750g) beef sirloin (cut into 1" (2.5cm) cubes)
• 1 red onion (peeled and thinly sliced)
• 2 tablespoons cooking oil
• 2 tablespoons garlic (minced )
• 1 tablespoon fish sauce
• 2 tablespoons oyster sauce
• 1 teaspoon sweet soy sauce (kecap manis or Maggie Seasoning)
• 1 1/2 tablespoons sugar
• 1 tablespoon sesame oil
• 1/2 cup rice vinegar
• 1/2 tablespoon salt
• 1 1/2 tablespoons sugar
• 2 bunches watercress (long stems trimmed)
• 2 tomatoes (thinly sliced)
• 1 lime (sliced into halves)
• 1/2 teaspoon kosher salt
• 1/2 teaspoon freshly cracked black pepper