1 Tbsp olive oil
4 leeks - white part only, sliced
1 onion, chopped
1 kg sweet potato, peeled and sliced
1 Tbsp cumin seeds, dry roasted
1.2 litres chicken stock
2-3 cup plain yoghurt
Heat oil, add leek and onion. Cook 8-10 mins until soft. Stir in sweet potato and cumin seeds and cook 2 mins. Add stock and bring to boil, reduce heat and simmer 20 mins. Puree soup until smooth. Swirl spoonful of yoghurt into each bowl when serving.
Other Soups recipes: Kumara & Ginger Soup, Pumpkin & Ginger Soup, Leek & Corn Chowder, Leek, Cumin & Sweet Potato Soup, Algerian Fish Soup