Heat 1tsp of oil in a pan, add 1 chopped onion, 450g of sliced carrots and 1 crushed garlic clove. Saute for 4 mins until the veg are beginning to soften. Stir in 1 tsp of ground coriander. Season with salt and pepper and cook for 1 min. Add 2 pints of veg stock and bring to the boil, cover and simmer for 20 mins. Liquidise the soup.
Reheat until hot but not boiling. Garnish with single cream (optional).