Sweet and Sour Sauce

Not exactly authentic I'm sure, but it fits our needs and we like it.

1 (6ounce) can pineapple juice

1/4 cup white vinegar

2/3 cup sugar

1/3 cup ketchup

2 tablespoons cornstarch

In medium saucepan, over medium heat, mix together all ingredients. Bring to boil and cook until thickened.