2 large carrots, peeled and roughly chopped
1 garlic clove, crushed
4cm/1½ inches fresh root ginger, finely chopped
1 onion, roughly chopped
salt and freshly ground black pepper
700g/1lb 10oz sweet potatoes, peeled and cubed
½ tsp dried red chilli flakes
1 tbsp olive oil
1.2 litres/2 pints vegetable stock