Zest oranges finely straight into the Thermomix bowl. Add the sugar and mill 10 sec/speed 10.
Add juice, cornflour, eggs and yolks and blend 5 sec/speed 7.
Cook 8 min/90°C/Butterfly/speed 4. Remove Butterfly.
Add butter and EVOO and mix 20 sec/speed 5.
Transfer to a sterlised jar and refrigerate until use.