Chicago style giardiniera is a zesty, tangy condiment that adds a burst of flavor to any dish. It's typically made with a mix of sliced vegetables like serrano peppers, bell peppers or jalapenos, celery, carrots, and cauliflower, all marinated in a blend of vinegar, olive oil, and an assortment of herbs and spices. This vibrant and colorful mix is perfect for topping Italian beef sandwiches, pizzas, adding a spicy kick to salads, and other dishes.