Preheat oven to 180ºC and line a baking tray with paper.
Place cheeses into Thermomix bowl and mill 10 sec/speed 1o.
Add remaining ingredients except seeds and blend 10 sec/speed 6.
Tip out onto floured Silpat mat and push together with hands.
Roll into small balls and place onto prepared tray. Dip into seeds and extra grated Parmesan. Flatten with a piece of baking paper between the biscuit and a flat bottomed glass to form rounds.
Bake 18 minutes until golden and fragrant. They are very crumbly, but that is the nature of a sable biscuit. Sable