Carrot and coriander soup is a simple and healthy meal that will help keep your waistline trim. Earthy carrots are cooked with sweet onion, salt, pepper, and water or stock until cooked through. The soup based is then spiked with orange juice and ground coriander. When shopping for spices, look for them whole and grind them yourself. They are fresher and will have a stronger flavor. Carrot and coriander soup is a lovely dish that you'll want to make sure has leftovers.