There are so many ways to enjoy this popular and versatile sauce. This sweet and sour sauce is perfect as a dipping sauce for potstickers, egg rolls, chicken nuggets and anything else your heart desires. Add all of the ingredients except for the cornstarch slurry in a small saucepan and bring to a boil. You can stop at this point or, if you want, you can add drops of food coloring to make your sweet and sour sauce look the way it does at the Chinese takeout. Check out this all-natural food coloring. Fab recipes, made this twice now, much better than local takeaway, can I freeze left over sauce though?