Sweet and sour vegetable stir-fry is a tangy and flavorful dish that combines a variety of colorful vegetables with a sweet and sour sauce. The recipe typically includes bell peppers, carrots, pineapple, and onions, all stir-fried in a sauce made with vinegar, sugar, and soy sauce. This stir-fry is a great option for those who enjoy a balance of sweet and savory flavors.