These walnut-sized sprouts are named after the city in Belgium where they were cultivated in the 16th century. Brussels sprouts are a cruciferous vegetable and packed full of nutrients - including being a good source of iron. Try roasting them to bring out their savory, nutty flavor. Washed and Ready to Use. Our Food You Feel Good About yellow banner is your shortcut to great-tasting products with no artificial colors, flavors or preservatives.