
This homemade sweet and sour sauce is glossy, tangy, and balanced with just the right amount of sweetness. It comes together quickly on the stovetop and works beautifully for stir-fries, dipping sauces, and classic Chinese-inspired dishes.
Heat the neutral oil in a small stainless steel or other non-reactive saucepan over medium-low heat. Add the ginger slice and star anise, and cook for about 1 minute, until the ginger is lightly caramelized and fragrant.
Stir in the tomato paste and cook for 1 to 2 minutes, stirring constantly, until it darkens slightly and smells rich and sweet. Do not let the tomato paste or spices burn.
Add the sugar, water, white vinegar, and soy sauce. Stir until the sugar dissolves completely, then add the optional fruit juice or syrup if using. Bring the mixture to a gentle simmer.
Lower the heat and simmer for about 10 minutes, or until the sauce reduces slightly and lightly coats the back of a spoon. Remove and discard the ginger and star anise.
Use the sauce as is for stir-fries, or let it cool and store it for later. If you want a thicker dipping sauce, whisk the cornstarch with 2 tablespoons water, then add the slurry a little at a time while the sauce simmers, stirring until it reaches your preferred consistency.
For a fruitier restaurant-style flavor, use pineapple juice in place of the optional juice or syrup. Store cooled sauce in an airtight container in the refrigerator for up to 1 week or freeze for up to 2 months. Add the cornstarch slurry gradually, since the sauce thickens quickly once heated.




