Start by preparing the ingredients: Squeeze fresh orange juice into a bowl, ensuring there are no seeds. Measure out your soy sauce, sugar, rice vinegar, and other ingredients. For a bolder flavor, grate fresh ginger and finely mince the garlic. Mixing these ingredients ahead makes the cooking process smooth and quick.
Cook the base: Put the sugar, rice vinegar, ginger, orange juice, and soy sauce in a medium-sized pot. Put the pan on medium-low heat and slowly stir the ingredients together until the sugar is gone.
This step ensures an even blend of flavors and prevents the sugar from sticking to the pan.
Thicken the sauce: Mix the cornstarch and water in a small bowl to make a mixture. This will thicken the sauce. Slowly pour the slurry into the saucepan while stirring continuously. After the mixture comes to a slow boil, turn down the heat. Let the sauce simmer for about 2-3 minutes until it thickens to your desired consistency.
Taste and adjust: Once the sauce is thickened, taste it to check the balance of sweetness, tanginess, and saltiness. Adjust as needed by adding a little more sugar, vinegar, or soy sauce. For a spicier kick, you can sprinkle in red pepper flakes.
Cool and serve: Remove the saucepan from heat and let the sauce cool slightly. Transfer it to a clean jar or container. This versatile sauce is ready to be drizzled over chicken, tofu, or stir-fried vegetables!