Place sweet potato and water into the Thermomix bowl.
Place brussels sprouts in the Varoma dish and set in place. Cook 12 min/Varoma/speed 1.
Add peas to the Varoma dish and continue cooking 3 min/Varoma/speed 1.
Drain the excess water from the Thermomix bowl and add salt, butter, cream and pepper oil. Whip 30 sec/speed 4.
Leave in the Thermomix bowl with the Varoma still in position until you are ready to serve.