Sweet Potato, Chilli and Ginger Soup

Name: Sweet Potato, Chilli and Ginger Soup
Prep time: 5 min
Cook time: 25 min
Total time: 30 min
Cuisine: Mediterranean
Ingredients: 2 tbsp olive oil; 1 onion (brown or red, peeled); 2 cloves garlic (peeled); 1 mild red chilli (deseeded and diced); 30 g Fresh ginger (peeled and grated); 500 ml vegetable stock; 600 g Sweet Potatoes (peeled and diced into 2cm/1 inch cubes); 1 dash salt; 1 dash freshly ground black pepper (fairtrade available); 1 Lime (zest and juice); 10 g Fresh Coriander /Cilantro (chopped (optional))