Step 1: Marinate the Beef
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In a bowl, combine thinly sliced beef with cornstarch, soy sauce, oyster sauce, and mayonnaise.
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Stir well to coat all pieces evenly.
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Let marinate for 15 minutes.
Step 2: Stir-Fry the Beef
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Heat 1 tablespoon of vegetable oil in a large skillet or wok over medium-high heat.
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Add the marinated beef and stir-fry for 3–4 minutes until browned and cooked through.
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Remove beef from skillet and set aside.
Step 3: Stir-Fry the Aromatics
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In the same skillet, add the remaining 1 tablespoon of vegetable oil.
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Add minced garlic and ginger. Stir-fry for about 30 seconds until fragrant.
Step 4: Cook the Vegetables
Step 5: Return Beef to Skillet
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Add cooked beef back to skillet.
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Season with salt, pepper, sugar, and sesame oil.
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Stir well to coat and cook for 2 more minutes.
Step 6: Garnish and Serve
Enjoy a quick, tender, and delicious Chinese-style beef stir-fry that bursts with flavo