Place tin of condensed milk (still in the tin) into the simmering basket and insert into TM bowl. Add enough water to come almost to the rim of the tin at the top without overfilling the Thermomix bowl.
Cook 90 min/100°C/speed 3. Cool in the bowl completely.
Drain TM bowl and dry. Remove the caramelised condensed milk from the tin and place into a container in the fridge until completely cold.
Place cold caramelised milk into the TM bowl. Add the salt, vanilla and cinnamon.
Beat 30 sec/speed 8.
Add cream to bowl and whip 20-40 sec/Butterfly/speed 4 or until stiff peaks form.
Pour into container of choice to freeze for minimum 4 hours, preferably longer.