Sween-n-sour sauce
Mix water and cornstarch until smooth. Add rest of the ingredients and heat over medium-low heat.
Cut up chicken (I use a whole breast) into bite sized chunks. Flour and cook in skillet over medium heat. Then add any cut up vegetables (green pepper and onions are good) and let cook for about a minute. Then add sauce and pineapple chunks; let simmer for a few minutes, then serve.
Oh, don't forget the rice.
I'd just like to note that the method for cutting up chicken [1] explained at Cooking for Engineers [2] is not only fast, but simple too! It's a much nicer method than the total lack of a method I was using before.
I still have to work on getting the breast meat off the bone though (which I typically use to make [DELETED-Chinese chicken nuggets-DELETED] sweet-n-sour chicken—one of the few dishes that I make that The Kids like).
[1] http://www.cookingforengineers.com/article.php?id=97