Do you like coriander? If so I am addicted to this...
450g Carrot
227g Potato
Large Onion
1tsp ground coriander
1l veg stock
1/2 pack fresh coriander leaves
fry light
salt and pepper to season
Spray a pan with fry light, fry onion for 5 mins, stir in ground coriander and potato, cook for 1 min, add carrots and stock, bring to boil, cover and simmer for 20mins. Blitz till smooth with fresh coriander, return to pan, add salt and pepper to taste.
I don't thin it down after this as I love thick soup, but you could add more stock, it's even nice with chicken stock