1. Heat olive oil in a pot. Add in the onion and apple. Cook for two to three minutes until softened.
2. Add garlic and turmeric. Cook until fragrant, about 30 seconds. Add carrots and stock, and cook for about 35 minutes, or until the carrots are soft.
3. Pour the soup into a food processor or blender and blend for around five minutes, then blend some more!
4. Return the soup to the pot and season with salt and pepper to taste.
5. Garnish with a drizzle of olive oil and croutons.