If you're a fan of bite-sized treats, then this recipe for Hong Kong-style sweet and sour chicken balls is perfect for you. The chicken is cut into small pieces, coated in a batter made with flour, cornstarch, and egg, and then deep-fried until crispy and golden. The sweet and sour sauce, prepared separately with vinegar, ketchup, sugar, and soy sauce, is served on the side for dipping. These chicken balls make a great appetizer or party snack, and they are sure to be a hit with both kids and adults alike.