Preheat Oven to 200C/fan 180C

Place the sweet potato, red onion and garlic in asingle layer in a roasting tray and drizzle with oil and a pinch of salt and pepper. Bake in the oven for 45 minuntil the sweet potato and garlic are soft.

Transfer the contents of the baking tray to deep pan. Add 500 mL of the stock and blend with a hand blender until smooth (or alternatively use afreestanding blender). Add more stock until the desired consistency is reached.

Add the chorizo to the soup and bring gently to the boil, then simmer for 5 min to warm the chorizo through. Season to taste.