Pre-make the Raspberry Sorbet mix and be ready to churn it before beginning. It can just hang out in the fridge and get nice and cold.
Place the pineapple and sugar into the Thermomix bowl and blend 10 sec/speed 10.
Cook 8 min/100°C/speed 1.
Add lime juice and blend 6 sec/speed 6.
Cool completely before proceeding.
Churn according to ice cream manufactures instructions. Store in the freezer while you churn the raspberry sorbet.
When the raspberry sorbet is almost frozen, place dollops of the still soft pineapple sorbet into the churner and it will marble together wonderfully.
Store in the freezer for a few hours. It will not reach full frozen density in just the churner as it is quite a soft sorbet.