Sweet Potato, Ginger & Coconut Milk Soup (Gluten Free, Dairy Free)

Ingredients

• 700 g sweet potatoes
• 1 tbsp olive oil
• 2 onions
• 1 tsp ground ginger
• 1 tsp ground cumn
• 1/2 tsp chilli powder
• 700 ml vegetable stock
• 400 ml tin of coconut milk
• handful of fresh coriander
• 1 tbsp lemon juice
• Salt and pepper for seasoning