The star of this dish is undoubtedly the tangy and sweet sauce that coats the chicken and vegetables. To create the perfect balance, combine ketchup, rice vinegar, soy sauce, pineapple juice, brown sugar, ginger, and garlic. The ketchup provides a rich tomato base, while the rice vinegar adds tanginess. The soy sauce brings savory depth, and the pineapple juice and brown sugar contribute a delightful sweetness. The ginger and garlic infuse aromatic flavors that elevate the dish. Adjust the ingredients to achieve your desired level of sweetness and tanginess, creating a sauce that tantalizes your taste buds.