Roughly chip the onion, garlic, carrots and beetroots.
Heat 1 Tbsp of olive oil in a saucepan and gently sauté the onion for 5 minutes, then add the garlic & ginger and stir-fry for a minute.
Ad the carrot and beetroot chunks, stir through, then pour over most of the stock (enough to cover the veggies).
Bring to the boil, cover and gently simmer for 25-30 minutes, until the veggies are tender.
Using a stick blender or liquidiser, whiz the soup until silky and smooth. Add the mandarin juice and more stock until you get the right consistency.
Reheat, if necessary before serving.
Serve with pumpkin seeds and a dollop of sour cream/ Greek yogurt (if liked).