Sweet and Sour Sauce (I)

Yields about 1/2 cup
INGREDIENTS:
1/3 cup white or rice vinegar
4 TB brown sugar
1 TB ketchup
1 tsp soy sauce
2 teaspoons cornstarch mixed with 4 teaspoons water
PREPARATION:Mix the vinegar, brown sugar, ketchup, and soy sauce together and bring to a boil in a small pot. Mix together the cornstarch and water, add to the other ingredients and stir to thicken.(If desired, you can add 1 green pepper, cut into chunks, and pineapple chunks as desired after adding the cornstarch.
For a thicker sauce, increase the cornstarch to 4 teaspoons while keeping the water constant.)