Heat olive oil in a large saucepan or pressure cooker over medium heat. Add chopped carrots, spring onions or leek, celery, and ginger. Sauté for 3–4 minutes until fragrant and slightly softened.
Step 2
Pour in the vegetable stock (or water), orange juice, and orange zest. Stir well. Cover and cook until the carrots are completely tender - about 15-20 minutes on the stovetop or 1 whistle in a pressure cooker.
Step 3
Allow the soup to cool slightly, then blend until smooth using an immersion blender or regular mixer.
Step 4
Return to the pot, season with salt and pepper, and heat through before serving hot.