Sweet & Sour Sauce
Equal parts Sugar and white vinegar.
Splash of soy sauce.
Squirt or two of catsup.
Dash of sesame oil.
Pinch of Chinese 5-spice (optional - otherwise use powdered ginger.)
Pinch or two of Corn starch mixed with cold water.
Water for mixing with the corn starch and thinning out the strong flavor of the sauce.
Heat until corn starch thickens and the right amount of water has been added. (Add a couple of tablespoons of water at a time and then taste test it.)
I've been loose in my measurements because it's really not a very complicated recipe, and slight variations add character without ruining the sauce. By the time you've made it three times, you can do it in your sleep!
"Food is our common ground, a universal experience." - James Beard