Yeo Kyung-rae's Oyster Sauce Beef Tenderloin Stir-Fry

A Chinese-style dish featuring tender beef tenderloin, crisp and crunchy lettuce, and refreshing cucumber stir-fried in oyster sauce—perfect served over rice.

🙋 Recommended for

  • Those who enjoy the textural contrast between tender beef and crisp lettuce
  • People who want to quickly create a delicious Chinese-style main course without complicated steps using just one starch sauce

Ingredients needed 🛒2 servings

  • beef tenderloin 200g
  • cucumber 0.5 medium
  • lettuce 3~4 leaves
  • green onion 0.5 stalk
  • ginger a small amount
  • water 10 tablespoons
  • oyster sauce 1 tablespoon
  • light soy sauce 1 tablespoon (for sauce) + 1 teaspoon (for marinating meat)
  • starch powder 2 tablespoons
  • black pepper a small amount
  • vegetable oil 2~3 tablespoons
  • sesame oil 1 teaspoon

Recipe 🍳

  1. Cut the cucumber in half and slice thinly. Tear the lettuce into bite-sized pieces. Slice the green onion and ginger finely for better aroma.
  2. In a bowl, mix water 10 tablespoons, oyster sauce 1 tablespoon, light soy sauce 1 tablespoon, starch powder 2 tablespoons, and black pepper a small amount until smooth, like milk, to prepare the starch sauce in advance.
  3. Slice the beef tenderloin into thick, jagged pieces suitable for eating. Marinate with 1 teaspoon light soy sauce and a small amount of black pepper, mixing gently.
  4. Heat a small amount of oil in a pan, add the marinated beef, and stir-fry until about 70–80% cooked on the outside. Remove and set aside, draining off excess oil and blood residue.
  5. Add 2–3 tablespoons of vegetable oil to the same pan, then sauté the sliced green onion and ginger to release their fragrance.
  6. Once the aroma rises, pour in the pre-mixed starch sauce while stirring continuously, and bring to a boil.
  7. When the sauce begins to bubble, add the stir-fried beef tenderloin, lettuce, and cucumber all at once. Quickly toss to evenly coat with sauce.
  8. Finish by drizzling a drop of sesame oil and mixing well. Serve either piled onto rice or plated directly.
  1. Prepare vegetables to size, and mix water, oyster sauce, soy sauce, starch, and pepper to make the starch sauce.
  2. Slice beef tenderloin, marinate with soy sauce and pepper, then quickly sear only the surface before removing from pan.
  3. Sauté green onion and ginger in oil, bring the sauce to a boil, then quickly stir in the meat and vegetables and finish with sesame oil.

Cooking tips 💡

  • Pre-mixing the starch into the sauce makes it much easier for beginners to achieve the right consistency and reduces overall cooking time.
  • The key appeal of this dish lies in the crisp texture of the lettuce, so avoid overcooking—just lightly toss at the end to preserve its fresh, sweet crunch.
  • Beef tenderloin becomes tough if overcooked, so it's best to quickly sear just the exterior and briefly stir-fry in the sauce.
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