If you're craving something tangy and sweet, this Sweet and Sour Vegetable Stir-Fry is the perfect choice. A colorful mix of bell peppers, pineapple, carrots, and onions are stir-fried in a sweet and sour sauce made with vinegar, ketchup, and brown sugar. The result is a vibrant and flavorful dish that pairs well with steamed rice or noodles. Add some crispy tofu or your choice of protein for a complete meal.