Spray the bottom of a large soup pan about 5 times with the low fat cooking spray.
Heat the soup pan on a high heat, then when the oil starts to bubble, turn the heat down to a lower heat.
Sauté the onion and garlic for 2 – 3 minutes, stirring constantly to ensure they don’t burn.
Add the carrots and cook for a further 2 – 3 minutes, again stirring constantly and add drops of hot water, if required, to prevent the mixture sticking to the bottom of the pan.
Stir in the ground ginger and chilli powder. Stir for 30 seconds.
Add the chopped sweet potato and vegetable stock. Simmer for 20 – 25 minutes until the vegetables are soft.
Blitz / puree in a food processor / blender, return to the same pot and re-heat.
Season to taste, serve and garnish with the mild chilli powder.