Sweet & Sour Sauce (Cheryl's)

This is Cheryl's recipe for the sweet and sour sauce she prepares and serves with egg rolls...

Combine:

2 tablespoons brown sugar, packed
2 tablespoons apple cider vinegar
1 small can (6 oz. juice can?) pineapple juice

Stir the following together until smooth and add to the above:

2 tablespoons water
1 tablespoon cornstarch

Heat the above 'combination' and boil until it begins to thicken.  Remove from heat and cool a bit before serving.