This warm and tangy soup has a beautiful muted-orange taste, and will add a touch of spice to your day. Organic carrots, potatoes, onions, and celery are highly recommended. The flavor of organic vegetables is incomparable to vegetables grown in individual fields. Organic root vegetables such as these are considered seasonal no matter where you live and are found easily in health food stores and even many supermarkets. Choosing organic oranges is especially important when making orange zest, so as not to ingest the surface pesticides found on industrially-grown orange skin.