I modified this recipe a bit from the original to make it easier/quicker to prepare.
It was amazing! The entire family loved it!
Bag of frozen popcorn chicken
1 cup sugar
4 tablespoons ketchup
1/4 cup white vinegar
1/4 cup apple cider vinegar
1 tablespoon soy sauce
1 teaspoon garlic salt
Mix all ingredients except chicken in a large bowl, add chicken and coat well.
Pour chicken and sauce onto a cookie sheet, spread out and bake at 325* for 30 minutes, turning once.
Recipe from: http://www.sixsistersstuff.com/2012/03/baked-sweet-and-sour-chicken-recipe.html