This soup is a little spicy, elegant enough for a dinner party, super cheap to make and very tasty... Don't be put off by the lentils - trust me you won't know they are there (and secretly they are so good for you).
- Peel and roughly chop the onions and sweet potatoes - can be chunky.
- Combine with the stock or water, lentils, garlic, cumin, cayenne and turmeric in a pot.
- Cover and bring to the boil. Simmer until the potatoes and lentils are cooked - about 20-30 minutes.
- Puree the soup, adding in the coriander and the juice of the lemon. Add salt and pepper to taste (lots of pepper for me).