I do a sweet and sour chicken one pretty frequently. It has a little bit of a Chinese style to it and pretty easy to make. I stir fry cut up chicken with broccoli, carrots and pineapple. You could add anything else you want too. Then in another pan I make the sauce
1/2 C brown sugar, 2 TBS cornstarch, 1/2 C pineapple juice, 1/4 C vinegar, 3 TBS soy sauce
Mix the sugar and cornstarch together, then add all the liquids and cook over low heat stirring very frequently. After about 15 minutes it will get a little clearer instead of cloudy and thicken when it is ready. I sometimes use a little extra pineapple juice. (the sauce is brown, not your typical Chinese sweet and sour that is bright red)
When everything is ready I serve over rice.