Hearty Sweet Potato and Chili Soup

INGREDIENTS
1 teaspoon ground mixed spice
1 teaspoon ground cumin seeds
1 teaspoon chilli flakes
1 teaspoon ground cinnamon
1 teaspoon smoked paprika
3 tbsps olive oil
8 red onions, peeled and sliced
8 sweet potatoes, peeled and diced
600ml vegetable stock
Sour cream and fresh coriander to serve

DIRECTIONS
Grind all the spices in a pestle and mortar.
Heat the oil in a medium saucepan and sauté the red onion and sweet potato for a few minutes, to soften.
Stir in the ground spices to coat the vegetables. Pour in the vegetable stock and reduce the heat and simmer gently for 18-20 minutes.
Blend using a hand blender or transfer to a liquidiser and blend until smooth.
Transfer to a serving plate and spoon the sour cream on top, to serve, garnish with the coriander leaves....