There's no need to order take out when you can easily and quickly prepare sweet and sour chicken at home, and it will have your kitchen smelling utterly amazing. After all, it's a lively mix of red bell pepper, canned pineapple, onion, tomato paste, cider vinegar, and brown sugar that's all cooked along with the diced chicken breast, with cornstarch being a thickening agent. Cooked rice is the must have accompaniment.