What is the red sauce that comes with sweet and sour chicken?

The red sauce that comes with sweet and sour chicken is typically called sweet and sour sauce. It's not actually a "red sauce" in the sense of a tomato-based sauce.

Sweet and sour sauce is a combination of:

* Sweet ingredients: Sugar, honey, pineapple juice

* Sour ingredients: Vinegar, lemon juice

* Other ingredients: Soy sauce, cornstarch, ginger, garlic

The red color comes from the tomato ketchup or red food coloring that is sometimes added to the sauce.

It's important to note that the exact recipe for sweet and sour sauce can vary, with different restaurants and families having their own variations.