To assemble a gluten-free version of this recipe you can supersede the all-purpose flour with a blend of gluten-free flours. Also, make sure to choose a sweet and sour sauce that is precisely labeled as gluten-free. Lastly, it's important to check that the baking powder you use is approved gluten-free. By making these substitutions you can still savor the taste of Sweet and Sour Chinese Chicken Balls without any worries, about gluten.