Place half of the potatoes into the Thermomix bowl and chop 3 sec/speed 5. Tip out into a large bowl. Add remaining potatoes and chop 3 sec/speed 5. Add to the bowl.
Rinse chopped potatoes in cold water and pat dry on sheets of paper towel.
Place onion into the Thermomix bowl and chop 2 sec/speed 7. Tip out onto paper towel and pat dry. Add to the potatoes.
Add egg, salt and flour to the potato and onion and stir to combine.
Preheat a pan to medium heat with a splash of EVOO.
Place a heaped tablespoon of the mixture into the hot oil, pressing down to flatten. Cook a couple minutes each side, or until browned.
Serve with smashed avocado, Parmesan Cream and sliced chillies to garnish. A poached egg is also amazing on these, or crispy bacon!