This recipe for classic Hong Kong-style sweet and sour chicken is a delicious and popular dish that can be easily made using a food processor. The chicken is first marinated in a mixture of soy sauce, ginger, and garlic, then coated in a batter made with flour, cornstarch, and baking powder. The chicken is then deep-fried until crispy and golden brown. The sweet and sour sauce is made by combining pineapple juice, ketchup, vinegar, and sugar, and then thickened with cornstarch. The crispy chicken is then tossed in the sauce, creating a perfect balance of sweet and tangy flavors. Serve this dish with steamed rice for a complete meal.