5-Minute Lumpiang Shanghai Sauce Recipe ~ Sweet & Sour Sauce Recipe

Combine soy sauce, vinegar, and water in a saucepan over medium heat.

Add minced garlic and chopped onion to the mixture.

Stir in sugar and pepper, mixing until sugar dissolves.

Bring the mixture to a simmer, allowing flavors to meld for 5-7 minutes.

In a small bowl, mix cornstarch with a little water to create a slurry.

Slowly add the cornstarch slurry to the simmering sauce while stirring continuously.

Cook until the sauce thickens, about 2-3 minutes.

Remove from heat and stir in chili flakes and sesame oil.

Let the sauce cool before serving.

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