Preheat oven to 160°C. Line a Swiss roll tray with baking paper.
Place beetroot, raspberries, lemon juice and apple cider vinegar into the Thermomix bowl and puree 1 min/speed 9. Scrape bowl and repeat. Set aside.
Sift flour, cocoa, baking powder and beetroot powder together. Set aside.
Place eggs and sugar into the Thermomix bowl, whip 8 min/37°C/Butterfly/speed 3/MC off.
Whip 20 min/Butterfly/speed 3/MC off.
Add half of the sifted flour mix to the bowl and incorporate 6 sec/Interval.
Add EVOO and salt and remaining flour mix. Incorporate 12 sec/Interval.
Finish combining by gently folding with a spatula. Pour into lined tray and bake 8 minutes. Or until JUST cooked. If it is overcooked, you won't be able to roll it. Remove from oven and let cool in tray with a clean tea towel over it.
When cool, turn cake out onto baking paper, trim sides if they're not soft. Spread Ermine Frosting all over. Roll the cake up, using the baking paper to help.
Dust with icing sugar.