This sweet and sour pineapple chicken recipe is a delicious twist on the classic Chinese dish. Tender chicken pieces are stir-fried with colorful bell peppers, onions, and chunks of juicy pineapple in a tangy sauce made with vinegar, ketchup, and soy sauce. The combination of sweet pineapple and savory chicken creates a perfect balance of flavors. Serve this dish over steamed rice for a satisfying meal that will please your taste buds.