Place onion, ginger, EVOO and celery into Thermomix bowl and chop 3 sec/speed 5.
Sauté 5 min/Varoma/speed 1.
Add beetroot and chop 7 sec/speed 7.
Add remaining ingredients except salt and yoghurt and cook 15 min/100°C/speed 2.
Puree by bringing speed up slowly 1 min/speed 8.
Taste and adjust seasoning.
Serve with yoghurt or sour cream.