Place 250g of the cream with the vanilla bean paste and powder and sugar into the Thermomix bowl and warm 8 min/80°C/speed 1.
Add the remaining cream, milk and salt into the Thermomix bowl and blend 10 sec/speed 8.*
Pour into a flat tray and cool completely before placing into the freezer overnight.
Break into pieces and place half into the Thermomix bowl. Blend for 20 sec/speed 8. Add remaining frozen chunks and keep blending with the aid of the Thermomix spatula until desired consistency is reached. You should serve immediately once re-blended in the Thermomix, though we put ours in the freezer again and it is pretty ok served the next day or so. It does get harder than the churned version.