1. Chop the tomato (no need to peel), dice the onion and peel and chop the sweet potato (about 1/2inch cubes in size) and place into a slow cooker along with the chickpeas.

2. Add all the spices, ginger and garlic to the vegetables and pour in the coconut milk and vegetable stock.

3. Turn the slow cooker on high for 3 hours until the sweet potato is nice and soft.

4. The curry is not yet finished, a the cornflour mixed into about 2tbsp of water and stir into the curry, turn the slow cooker on high for a further 1/2 an hour so it can thicken, a few minutes before the end stir in the spinach so it can wilt but not over cook then serve.

5. If you don't want to use a slow cooker you can do this in a pan, place all except the cornflour an spinach in a pan and cook on a medium heat for 30-45 minutes until the sweet potato is soft, stir in the cornflour to thicken then add the spinach, wilt and serve.