1. In a large pot, fry diced onion, tomato and mint in some oil.
2. Add in the peppercorn, cinnamon sticks and cloves and simmer for 2mins.
3. Add some salt
4. Add in chicken pieces and cover with water for 10mins.
5. Add in sweet potato, cover and cook for 5mins more.
6. Add in the rest of the vegetables, cover ¾ with water, place the lid on and cook on simmer for another 10mins.