Place oreos and butter into the Thermomix bowl and blend 10 sec/speed 8
Press this mixture into a paper lined rectangular tin (measurement) and place into the freezer.
Place the condensed milk, EVOO, vanilla, peppermint oil, and green colouring into the Thermomix bowl and blend 20 sec/speed 6. Remove from bowl and set aside.
Without cleaning, place cream into the bowl and whip 15-20 sec/Butterfly/speed 4 or until holding still peaks. Remove Butterfly.
Return the condensed milk mixture to the bowl and blend 3 sec/speed 6. Finish folding the mixture together using your spat-ooh-lah-lah and pour onto the partially frozen base.
Decorate with the chopped peppermint crisp bars.
Freeze 4-5 hours. Slice into bars and serve on demand!