Prepare the cornstarch mixture by combining 4 tablespoons of cold water with 2 tablespoons of cornstarch in a small bowl, ensuring a smooth and silky consistency. This will act as the thickening agent for our La Choy Sweet and Sour Sauce.
In a medium-sized saucepan, mix together 1 cup of pineapple juice, 2/3 cup of white sugar, and 6 tablespoons of white vinegar until fully combined. This will provide a sweet and tangy base for our sauce.
For an added kick, you can incorporate 4 teaspoons of sambal oelek or 1 teaspoon of red chili flakes into the mixture. If desired, add 4-6 drops of red food coloring for a visually striking red hue.
Bring the saucepan to medium-high heat and allow the mixture to boil, stirring occasionally.
Once boiling, add the cornstarch mixture from step 1 into the saucepan and stir well. Continue cooking for approximately 2 minutes until the sauce thickens and becomes glossy.
Turn off the heat and add 4 tablespoons of Tamari (or soy sauce) and 1/2 cup of ketchup to the saucepan, stirring until fully combined. Your La Choy Sweet and Sour Sauce is now ready to be served and enjoyed!