Place parmesan into the Thermomix bowl and mill 10 sec/speed 10. Remove from bowl and set aside.
Place chicken into bowl and chop 10 sec/speed 7.
Add milk, water, stock powder and potato and cook 15 min/Varoma/speed 1.
Add egg yolks, butter and reserved Parmesan and blend 2 min/speed 10. Add cream and blend 20 sec/speed 10.
Garnish with dried herbs, chilli flakes and sage leaves.