A Bikini Promise recipe that's bursting with flavour: Spicy sweet potato and pumpkin soup

My yummy guilt-free sweet potato and pumpkin soup is bursting with flavour! 

Makes 8 servings, perfect to store for another day

Ingredient:
800g sweet potatoes, peeled and cut into large dices 
490g pumpkin, peeled and cut into large dices 
1 tbsp harissa paste 
2 tsp ground cumin 
1 garlic clove, crushed 
2 tbsp olive oil 
600ml vegetable stock 
250g low-fat natural yogurt 
Chopped fresh chives to garnish 

Method:

1. Preheat the oven to 180°C/fan 160°C/gas 4
2. Put the sweet potatoes and pumpkin into a baking tray with the harissa paste, cumin, garlic and oil. Toss to coat evenly and cook in the oven for 50 min, or until cooked and tender. Transfer to a large pan and cover with the stock. Bring to the boil and simmer for 30 min. 
3. Purée with a stick blender until smooth, then blend in the yogurt, reserving a little to drizzle
4. Adjust the seasoning with a pinch of salt and freshly ground black pepper to taste

*Gently reheat the soup and top with a drizzle of the remaining yogurt, the chopped chives and a sprinkle of black pepper